diff --git a/src/cascadia/LocalTests_TerminalApp/SettingsTests.cpp b/src/cascadia/LocalTests_TerminalApp/SettingsTests.cpp
index f317ba1fb35..956881facd9 100644
--- a/src/cascadia/LocalTests_TerminalApp/SettingsTests.cpp
+++ b/src/cascadia/LocalTests_TerminalApp/SettingsTests.cpp
@@ -177,9 +177,9 @@ namespace TerminalAppLocalTests
             {
                 settings->_ValidateProfilesExist();
             }
-            catch (const ::TerminalApp::SettingsException& ex)
+            catch (const winrt::TerminalApp::implementation::SettingsException& ex)
             {
-                VERIFY_IS_TRUE(ex.Error() == ::TerminalApp::SettingsLoadErrors::NoProfiles);
+                VERIFY_IS_TRUE(ex.Error() == winrt::TerminalApp::SettingsLoadErrors::NoProfiles);
                 caughtExpectedException = true;
             }
             VERIFY_IS_TRUE(caughtExpectedException);
@@ -193,9 +193,9 @@ namespace TerminalAppLocalTests
             {
                 settings->_ValidateProfilesExist();
             }
-            catch (const ::TerminalApp::SettingsException& ex)
+            catch (const winrt::TerminalApp::implementation::SettingsException& ex)
             {
-                VERIFY_IS_TRUE(ex.Error() == ::TerminalApp::SettingsLoadErrors::NoProfiles);
+                VERIFY_IS_TRUE(ex.Error() == winrt::TerminalApp::SettingsLoadErrors::NoProfiles);
                 caughtExpectedException = true;
             }
             VERIFY_IS_TRUE(caughtExpectedException);
@@ -272,7 +272,7 @@ namespace TerminalAppLocalTests
             auto settings = implementation::CascadiaSettings::FromJson(settingsObject);
             settings->_ResolveDefaultProfile();
             settings->_ValidateDefaultProfileExists();
-            VERIFY_ARE_EQUAL(static_cast<size_t>(0), settings->_warnings.size());
+            VERIFY_ARE_EQUAL(static_cast<size_t>(0), settings->_warnings.Size());
             VERIFY_ARE_EQUAL(static_cast<size_t>(2), settings->_profiles.Size());
             VERIFY_ARE_EQUAL(settings->_globals->DefaultProfile(), settings->_profiles.GetAt(0).Guid());
         }
@@ -284,8 +284,8 @@ namespace TerminalAppLocalTests
             auto settings = implementation::CascadiaSettings::FromJson(settingsObject);
             settings->_ResolveDefaultProfile();
             settings->_ValidateDefaultProfileExists();
-            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.size());
-            VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingDefaultProfile, settings->_warnings.at(0));
+            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.Size());
+            VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingDefaultProfile, settings->_warnings.GetAt(0));
 
             VERIFY_ARE_EQUAL(static_cast<size_t>(2), settings->_profiles.Size());
             VERIFY_ARE_EQUAL(settings->_globals->DefaultProfile(), settings->_profiles.GetAt(0).Guid());
@@ -298,8 +298,8 @@ namespace TerminalAppLocalTests
             auto settings = implementation::CascadiaSettings::FromJson(settingsObject);
             settings->_ResolveDefaultProfile();
             settings->_ValidateDefaultProfileExists();
-            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.size());
-            VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingDefaultProfile, settings->_warnings.at(0));
+            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.Size());
+            VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingDefaultProfile, settings->_warnings.GetAt(0));
 
             VERIFY_ARE_EQUAL(static_cast<size_t>(2), settings->_profiles.Size());
             VERIFY_ARE_EQUAL(settings->_globals->DefaultProfile(), settings->_profiles.GetAt(0).Guid());
@@ -312,7 +312,7 @@ namespace TerminalAppLocalTests
             auto settings = implementation::CascadiaSettings::FromJson(settingsObject);
             settings->_ResolveDefaultProfile();
             settings->_ValidateDefaultProfileExists();
-            VERIFY_ARE_EQUAL(static_cast<size_t>(0), settings->_warnings.size());
+            VERIFY_ARE_EQUAL(static_cast<size_t>(0), settings->_warnings.Size());
             VERIFY_ARE_EQUAL(static_cast<size_t>(2), settings->_profiles.Size());
             VERIFY_ARE_EQUAL(settings->_globals->DefaultProfile(), settings->_profiles.GetAt(1).Guid());
         }
@@ -407,7 +407,7 @@ namespace TerminalAppLocalTests
 
             settings->_ValidateNoDuplicateProfiles();
 
-            VERIFY_ARE_EQUAL(static_cast<size_t>(0), settings->_warnings.size());
+            VERIFY_ARE_EQUAL(static_cast<size_t>(0), settings->_warnings.Size());
             VERIFY_ARE_EQUAL(static_cast<size_t>(2), settings->_profiles.Size());
         }
         {
@@ -421,8 +421,8 @@ namespace TerminalAppLocalTests
 
             settings->_ValidateNoDuplicateProfiles();
 
-            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.size());
-            VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::DuplicateProfile, settings->_warnings.at(0));
+            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.Size());
+            VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::DuplicateProfile, settings->_warnings.GetAt(0));
 
             VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_profiles.Size());
             VERIFY_ARE_EQUAL(L"profile2", settings->_profiles.GetAt(0).Name());
@@ -443,8 +443,8 @@ namespace TerminalAppLocalTests
 
             settings->_ValidateNoDuplicateProfiles();
 
-            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.size());
-            VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::DuplicateProfile, settings->_warnings.at(0));
+            VERIFY_ARE_EQUAL(static_cast<size_t>(1), settings->_warnings.Size());
+            VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::DuplicateProfile, settings->_warnings.GetAt(0));
 
             VERIFY_ARE_EQUAL(static_cast<size_t>(4), settings->_profiles.Size());
             VERIFY_ARE_EQUAL(L"profile0", settings->_profiles.GetAt(0).Name());
@@ -490,10 +490,10 @@ namespace TerminalAppLocalTests
 
         settings->_ValidateSettings();
 
-        VERIFY_ARE_EQUAL(3u, settings->_warnings.size());
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::DuplicateProfile, settings->_warnings.at(0));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingDefaultProfile, settings->_warnings.at(1));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::UnknownColorScheme, settings->_warnings.at(2));
+        VERIFY_ARE_EQUAL(3u, settings->_warnings.Size());
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::DuplicateProfile, settings->_warnings.GetAt(0));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingDefaultProfile, settings->_warnings.GetAt(1));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::UnknownColorScheme, settings->_warnings.GetAt(2));
 
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
         VERIFY_ARE_EQUAL(settings->_globals->DefaultProfile(), settings->_profiles.GetAt(0).Guid());
@@ -905,7 +905,7 @@ namespace TerminalAppLocalTests
         VERIFY_IS_FALSE(settings->_profiles.GetAt(1).HasGuid());
 
         settings->_ValidateSettings();
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(2u, settings->_profiles.Size());
         VERIFY_IS_TRUE(settings->_profiles.GetAt(0).HasGuid());
         VERIFY_IS_TRUE(settings->_profiles.GetAt(1).HasGuid());
@@ -956,7 +956,7 @@ namespace TerminalAppLocalTests
         VERIFY_ARE_EQUAL(L"profile1", settings->_profiles.GetAt(3).Name());
 
         settings->_ValidateSettings();
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(4u, settings->_profiles.Size());
         VERIFY_IS_TRUE(settings->_profiles.GetAt(0).HasGuid());
         VERIFY_IS_TRUE(settings->_profiles.GetAt(1).HasGuid());
@@ -1057,7 +1057,7 @@ namespace TerminalAppLocalTests
         VERIFY_ARE_EQUAL(L"Ubuntu", settings->_profiles.GetAt(3).Name());
 
         settings->_ValidateSettings();
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(4u, settings->_profiles.Size());
         VERIFY_IS_TRUE(settings->_profiles.GetAt(0).HasGuid());
         VERIFY_IS_TRUE(settings->_profiles.GetAt(1).HasGuid());
@@ -1280,9 +1280,9 @@ namespace TerminalAppLocalTests
             {
                 settings->_RemoveHiddenProfiles();
             }
-            catch (const ::TerminalApp::SettingsException& ex)
+            catch (const winrt::TerminalApp::implementation::SettingsException& ex)
             {
-                VERIFY_IS_TRUE(ex.Error() == ::TerminalApp::SettingsLoadErrors::AllProfilesHidden);
+                VERIFY_IS_TRUE(ex.Error() == winrt::TerminalApp::SettingsLoadErrors::AllProfilesHidden);
                 caughtExpectedException = true;
             }
             VERIFY_IS_TRUE(caughtExpectedException);
@@ -1337,8 +1337,8 @@ namespace TerminalAppLocalTests
 
         settings->_ValidateAllSchemesExist();
 
-        VERIFY_ARE_EQUAL(1u, settings->_warnings.size());
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::UnknownColorScheme, settings->_warnings.at(0));
+        VERIFY_ARE_EQUAL(1u, settings->_warnings.Size());
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::UnknownColorScheme, settings->_warnings.GetAt(0));
 
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
         VERIFY_ARE_EQUAL(2u, settings->_globals->GetColorSchemes().Size());
@@ -2179,7 +2179,7 @@ namespace TerminalAppLocalTests
         auto settings = implementation::CascadiaSettings::FromJson(settingsJsonObj);
         settings->_ValidateSettings();
 
-        VERIFY_ARE_EQUAL(2u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(2u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(2u, settings->_profiles.Size());
         VERIFY_ARE_EQUAL(settings->_globals->DefaultProfile(), settings->_profiles.GetAt(0).Guid());
         try
@@ -2291,17 +2291,17 @@ namespace TerminalAppLocalTests
         VERIFY_ARE_EQUAL(0u, settings->_globals->_keybindings->_keyShortcuts.size());
 
         VERIFY_ARE_EQUAL(3u, settings->_globals->_keybindingsWarnings.size());
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::TooManyKeysForChord, settings->_globals->_keybindingsWarnings.at(0));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(1));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(2));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::TooManyKeysForChord, settings->_globals->_keybindingsWarnings.at(0));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(1));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(2));
 
         settings->_ValidateKeybindings();
 
-        VERIFY_ARE_EQUAL(4u, settings->_warnings.size());
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::AtLeastOneKeybindingWarning, settings->_warnings.at(0));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::TooManyKeysForChord, settings->_warnings.at(1));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.at(2));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.at(3));
+        VERIFY_ARE_EQUAL(4u, settings->_warnings.Size());
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::AtLeastOneKeybindingWarning, settings->_warnings.GetAt(0));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::TooManyKeysForChord, settings->_warnings.GetAt(1));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.GetAt(2));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.GetAt(3));
     }
 
     void SettingsTests::ValidateExecuteCommandlineWarning()
@@ -2338,17 +2338,17 @@ namespace TerminalAppLocalTests
                 L"warning:%d", warning));
         }
         VERIFY_ARE_EQUAL(3u, settings->_globals->_keybindingsWarnings.size());
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(0));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(1));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(2));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(0));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(1));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_globals->_keybindingsWarnings.at(2));
 
         settings->_ValidateKeybindings();
 
-        VERIFY_ARE_EQUAL(4u, settings->_warnings.size());
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::AtLeastOneKeybindingWarning, settings->_warnings.at(0));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.at(1));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.at(2));
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.at(3));
+        VERIFY_ARE_EQUAL(4u, settings->_warnings.Size());
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::AtLeastOneKeybindingWarning, settings->_warnings.GetAt(0));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.GetAt(1));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.GetAt(2));
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter, settings->_warnings.GetAt(3));
     }
 
     void SettingsTests::ValidateLegacyGlobalsWarning()
@@ -2376,15 +2376,15 @@ namespace TerminalAppLocalTests
         settings->LayerJson(settings->_defaultSettings);
 
         settings->_ValidateNoGlobalsKey();
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
 
         // Now layer on the user's settings
         settings->_ParseJsonString(badSettings, false);
         settings->LayerJson(settings->_userSettings);
 
         settings->_ValidateNoGlobalsKey();
-        VERIFY_ARE_EQUAL(1u, settings->_warnings.size());
-        VERIFY_ARE_EQUAL(::TerminalApp::SettingsLoadWarnings::LegacyGlobalsProperty, settings->_warnings.at(0));
+        VERIFY_ARE_EQUAL(1u, settings->_warnings.Size());
+        VERIFY_ARE_EQUAL(winrt::TerminalApp::SettingsLoadWarnings::LegacyGlobalsProperty, settings->_warnings.GetAt(0));
     }
 
     void SettingsTests::TestTrailingCommas()
@@ -2668,7 +2668,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
 
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
@@ -2696,7 +2696,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, expandedCommands.Size());
 
         {
@@ -2799,7 +2799,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
 
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
@@ -2827,7 +2827,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, expandedCommands.Size());
 
         {
@@ -2932,7 +2932,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
 
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
@@ -2961,7 +2961,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, expandedCommands.Size());
 
         {
@@ -3075,7 +3075,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
@@ -3083,7 +3083,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(1u, expandedCommands.Size());
 
         auto rootCommandProj = expandedCommands.Lookup(L"Connect to ssh...");
@@ -3184,7 +3184,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
@@ -3192,7 +3192,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(1u, expandedCommands.Size());
 
         auto grandparentCommandProj = expandedCommands.Lookup(L"grandparent");
@@ -3324,7 +3324,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
@@ -3332,7 +3332,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
 
         VERIFY_ARE_EQUAL(3u, expandedCommands.Size());
 
@@ -3478,7 +3478,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
@@ -3486,7 +3486,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(1u, expandedCommands.Size());
 
         auto rootCommandProj = expandedCommands.Lookup(L"New Tab With Profile...");
@@ -3592,7 +3592,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
@@ -3600,7 +3600,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(1u, expandedCommands.Size());
 
         auto rootCommandProj = expandedCommands.Lookup(L"New Pane...");
@@ -3754,14 +3754,14 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
         settings->_ValidateSettings();
         _logCommandNames(commands);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
 
         // Because the "parent" command didn't have a name, it couldn't be
         // placed into the list of commands. It and it's children are just
@@ -3831,14 +3831,14 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
         settings->_ValidateSettings();
         _logCommandNames(commands);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(1u, commands.Size());
 
         Log::Comment(L"Layer second bit of json, to unbind the original command.");
@@ -3847,7 +3847,7 @@ namespace TerminalAppLocalTests
         settings->LayerJson(settings->_userSettings);
         settings->_ValidateSettings();
         _logCommandNames(commands);
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(0u, commands.Size());
     }
 
@@ -3914,14 +3914,14 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
         auto commands = settings->_globals->GetCommands();
         settings->_ValidateSettings();
         _logCommandNames(commands);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(1u, commands.Size());
 
         {
@@ -3941,7 +3941,7 @@ namespace TerminalAppLocalTests
         settings->LayerJson(settings->_userSettings);
         settings->_ValidateSettings();
         _logCommandNames(commands);
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(1u, commands.Size());
 
         {
@@ -4010,7 +4010,7 @@ namespace TerminalAppLocalTests
         settings->_ParseJsonString(settingsJson, false);
         settings->LayerJson(settings->_userSettings);
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
 
         VERIFY_ARE_EQUAL(3u, settings->_profiles.Size());
 
@@ -4038,7 +4038,7 @@ namespace TerminalAppLocalTests
         auto expandedCommands = implementation::TerminalPage::_ExpandCommands(commands, settings->Profiles().GetView(), settings->_globals->GetColorSchemes());
         _logCommandNames(expandedCommands.GetView());
 
-        VERIFY_ARE_EQUAL(0u, settings->_warnings.size());
+        VERIFY_ARE_EQUAL(0u, settings->_warnings.Size());
         VERIFY_ARE_EQUAL(3u, expandedCommands.Size());
 
         // Yes, this test is testing splitPane with profiles named after each
diff --git a/src/cascadia/TerminalApp/ActionAndArgs.cpp b/src/cascadia/TerminalApp/ActionAndArgs.cpp
index 76943897177..8f7048f9dc0 100644
--- a/src/cascadia/TerminalApp/ActionAndArgs.cpp
+++ b/src/cascadia/TerminalApp/ActionAndArgs.cpp
@@ -105,7 +105,7 @@ namespace winrt::TerminalApp::implementation
         { UnboundKey, ShortcutAction::Invalid },
     };
 
-    using ParseResult = std::tuple<IActionArgs, std::vector<::TerminalApp::SettingsLoadWarnings>>;
+    using ParseResult = std::tuple<IActionArgs, std::vector<TerminalApp::SettingsLoadWarnings>>;
     using ParseActionFunction = std::function<ParseResult(const Json::Value&)>;
 
     // This is a map of ShortcutAction->function<IActionArgs(Json::Value)>. It holds
@@ -169,7 +169,7 @@ namespace winrt::TerminalApp::implementation
     // - a deserialized ActionAndArgs corresponding to the values in json, or
     //   null if we failed to deserialize an action.
     winrt::com_ptr<ActionAndArgs> ActionAndArgs::FromJson(const Json::Value& json,
-                                                          std::vector<::TerminalApp::SettingsLoadWarnings>& warnings)
+                                                          std::vector<TerminalApp::SettingsLoadWarnings>& warnings)
     {
         // Invalid is our placeholder that the action was not parsed.
         ShortcutAction action = ShortcutAction::Invalid;
@@ -208,7 +208,7 @@ namespace winrt::TerminalApp::implementation
         // does, we'll try to deserialize any "args" that were provided with
         // the binding.
         IActionArgs args{ nullptr };
-        std::vector<::TerminalApp::SettingsLoadWarnings> parseWarnings;
+        std::vector<TerminalApp::SettingsLoadWarnings> parseWarnings;
         const auto deserializersIter = argParsers.find(action);
         if (deserializersIter != argParsers.end())
         {
diff --git a/src/cascadia/TerminalApp/ActionAndArgs.h b/src/cascadia/TerminalApp/ActionAndArgs.h
index bc202216379..a0e26fc8957 100644
--- a/src/cascadia/TerminalApp/ActionAndArgs.h
+++ b/src/cascadia/TerminalApp/ActionAndArgs.h
@@ -9,7 +9,7 @@ namespace winrt::TerminalApp::implementation
     {
         static const std::map<std::string_view, ShortcutAction, std::less<>> ActionKeyNamesMap;
         static winrt::com_ptr<ActionAndArgs> FromJson(const Json::Value& json,
-                                                      std::vector<::TerminalApp::SettingsLoadWarnings>& warnings);
+                                                      std::vector<TerminalApp::SettingsLoadWarnings>& warnings);
 
         ActionAndArgs() = default;
         hstring GenerateName() const;
diff --git a/src/cascadia/TerminalApp/ActionArgs.h b/src/cascadia/TerminalApp/ActionArgs.h
index de3bbd0b3da..3f7e829cd04 100644
--- a/src/cascadia/TerminalApp/ActionArgs.h
+++ b/src/cascadia/TerminalApp/ActionArgs.h
@@ -39,7 +39,7 @@
 namespace winrt::TerminalApp::implementation
 {
     using namespace ::TerminalApp;
-    using FromJsonResult = std::tuple<winrt::TerminalApp::IActionArgs, std::vector<::TerminalApp::SettingsLoadWarnings>>;
+    using FromJsonResult = std::tuple<winrt::TerminalApp::IActionArgs, std::vector<TerminalApp::SettingsLoadWarnings>>;
 
     struct ActionEventArgs : public ActionEventArgsT<ActionEventArgs>
     {
@@ -202,7 +202,7 @@ namespace winrt::TerminalApp::implementation
             JsonUtils::GetValueForKey(json, DirectionKey, args->_Direction);
             if (args->_Direction == TerminalApp::Direction::None)
             {
-                return { nullptr, { ::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
+                return { nullptr, { TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
             }
             else
             {
@@ -237,7 +237,7 @@ namespace winrt::TerminalApp::implementation
             JsonUtils::GetValueForKey(json, DirectionKey, args->_Direction);
             if (args->_Direction == TerminalApp::Direction::None)
             {
-                return { nullptr, { ::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
+                return { nullptr, { TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
             }
             else
             {
@@ -299,7 +299,7 @@ namespace winrt::TerminalApp::implementation
             JsonUtils::GetValueForKey(json, InputKey, args->_Input);
             if (args->_Input.empty())
             {
-                return { nullptr, { ::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
+                return { nullptr, { TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
             }
             return { *args, {} };
         }
@@ -395,7 +395,7 @@ namespace winrt::TerminalApp::implementation
             JsonUtils::GetValueForKey(json, NameKey, args->_SchemeName);
             if (args->_SchemeName.empty())
             {
-                return { nullptr, { ::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
+                return { nullptr, { TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
             }
             return { *args, {} };
         }
@@ -486,7 +486,7 @@ namespace winrt::TerminalApp::implementation
             JsonUtils::GetValueForKey(json, CommandlineKey, args->_Commandline);
             if (args->_Commandline.empty())
             {
-                return { nullptr, { ::TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
+                return { nullptr, { TerminalApp::SettingsLoadWarnings::MissingRequiredParameter } };
             }
             return { *args, {} };
         }
diff --git a/src/cascadia/TerminalApp/AppKeyBindings.h b/src/cascadia/TerminalApp/AppKeyBindings.h
index 4feb7e8968a..5a726046589 100644
--- a/src/cascadia/TerminalApp/AppKeyBindings.h
+++ b/src/cascadia/TerminalApp/AppKeyBindings.h
@@ -53,7 +53,7 @@ namespace winrt::TerminalApp::implementation
         static Windows::System::VirtualKeyModifiers ConvertVKModifiers(winrt::Microsoft::Terminal::TerminalControl::KeyModifiers modifiers);
 
         // Defined in AppKeyBindingsSerialization.cpp
-        std::vector<::TerminalApp::SettingsLoadWarnings> LayerJson(const Json::Value& json);
+        std::vector<TerminalApp::SettingsLoadWarnings> LayerJson(const Json::Value& json);
         Json::Value ToJson();
 
         void SetDispatch(const winrt::TerminalApp::ShortcutActionDispatch& dispatch);
diff --git a/src/cascadia/TerminalApp/AppKeyBindingsSerialization.cpp b/src/cascadia/TerminalApp/AppKeyBindingsSerialization.cpp
index 2bb507ec86f..907cf9f1b3f 100644
--- a/src/cascadia/TerminalApp/AppKeyBindingsSerialization.cpp
+++ b/src/cascadia/TerminalApp/AppKeyBindingsSerialization.cpp
@@ -93,13 +93,13 @@ Json::Value winrt::TerminalApp::implementation::AppKeyBindings::ToJson()
 //   `"unbound"`, then we'll clear the keybinding from the existing keybindings.
 // Arguments:
 // - json: an array of Json::Value's to deserialize into our _keyShortcuts mapping.
-std::vector<::TerminalApp::SettingsLoadWarnings> winrt::TerminalApp::implementation::AppKeyBindings::LayerJson(const Json::Value& json)
+std::vector<SettingsLoadWarnings> winrt::TerminalApp::implementation::AppKeyBindings::LayerJson(const Json::Value& json)
 {
     // It's possible that the user provided keybindings have some warnings in
     // them - problems that we should alert the user to, but we can recover
     // from. Most of these warnings cannot be detected later in the Validate
     // settings phase, so we'll collect them now.
-    std::vector<::TerminalApp::SettingsLoadWarnings> warnings;
+    std::vector<SettingsLoadWarnings> warnings;
 
     for (const auto& value : json)
     {
@@ -121,7 +121,7 @@ std::vector<::TerminalApp::SettingsLoadWarnings> winrt::TerminalApp::implementat
             // TODO: GH#1334 - remove this check.
             if (keys.isArray() && keys.size() > 1)
             {
-                warnings.push_back(::TerminalApp::SettingsLoadWarnings::TooManyKeysForChord);
+                warnings.push_back(SettingsLoadWarnings::TooManyKeysForChord);
             }
 
             if (!validString && !validArray)
diff --git a/src/cascadia/TerminalApp/AppLogic.cpp b/src/cascadia/TerminalApp/AppLogic.cpp
index 1b9c1304113..a4fa041601e 100644
--- a/src/cascadia/TerminalApp/AppLogic.cpp
+++ b/src/cascadia/TerminalApp/AppLogic.cpp
@@ -29,7 +29,7 @@ static const winrt::hstring StartupTaskName = L"StartTerminalOnLoginTask";
 // !!! IMPORTANT !!!
 // Make sure that these keys are in the same order as the
 // SettingsLoadWarnings/Errors enum is!
-static const std::array<std::wstring_view, static_cast<uint32_t>(SettingsLoadWarnings::WARNINGS_SIZE)> settingsLoadWarningsLabels {
+static const std::array<std::wstring_view, static_cast<uint32_t>(winrt::TerminalApp::SettingsLoadWarnings::WARNINGS_SIZE)> settingsLoadWarningsLabels {
     USES_RESOURCE(L"MissingDefaultProfileText"),
     USES_RESOURCE(L"DuplicateProfileText"),
     USES_RESOURCE(L"UnknownColorSchemeText"),
@@ -41,7 +41,7 @@ static const std::array<std::wstring_view, static_cast<uint32_t>(SettingsLoadWar
     USES_RESOURCE(L"LegacyGlobalsProperty"),
     USES_RESOURCE(L"FailedToParseCommandJson")
 };
-static const std::array<std::wstring_view, static_cast<uint32_t>(SettingsLoadErrors::ERRORS_SIZE)> settingsLoadErrorsLabels {
+static const std::array<std::wstring_view, static_cast<uint32_t>(winrt::TerminalApp::SettingsLoadErrors::ERRORS_SIZE)> settingsLoadErrorsLabels {
     USES_RESOURCE(L"NoProfilesText"),
     USES_RESOURCE(L"AllProfilesHiddenText")
 };
@@ -76,7 +76,7 @@ static winrt::hstring _GetMessageText(uint32_t index, std::array<std::wstring_vi
 // - warning: the SettingsLoadWarnings value to get the localized text for.
 // Return Value:
 // - localized text for the given warning
-static winrt::hstring _GetWarningText(::TerminalApp::SettingsLoadWarnings warning)
+static winrt::hstring _GetWarningText(winrt::TerminalApp::SettingsLoadWarnings warning)
 {
     return _GetMessageText(static_cast<uint32_t>(warning), settingsLoadWarningsLabels);
 }
@@ -89,7 +89,7 @@ static winrt::hstring _GetWarningText(::TerminalApp::SettingsLoadWarnings warnin
 // - error: the SettingsLoadErrors value to get the localized text for.
 // Return Value:
 // - localized text for the given error
-static winrt::hstring _GetErrorText(::TerminalApp::SettingsLoadErrors error)
+static winrt::hstring _GetErrorText(winrt::TerminalApp::SettingsLoadErrors error)
 {
     return _GetMessageText(static_cast<uint32_t>(error), settingsLoadErrorsLabels);
 }
@@ -411,8 +411,7 @@ namespace winrt::TerminalApp::implementation
         // Make sure the lines of text wrap
         warningsTextBlock.TextWrapping(TextWrapping::Wrap);
 
-        const auto settingsImpl{ winrt::get_self<implementation::CascadiaSettings>(_settings) };
-        const auto& warnings = settingsImpl->GetWarnings();
+        const auto warnings = _settings.Warnings();
         for (const auto& warning : warnings)
         {
             // Try looking up the warning message key for each warning.
@@ -631,9 +630,18 @@ namespace winrt::TerminalApp::implementation
             auto newSettings = _isUwp ? CascadiaSettings::LoadUniversal() : CascadiaSettings::LoadAll();
             _settings = newSettings;
 
-            const auto settingsImpl{ winrt::get_self<implementation::CascadiaSettings>(_settings) };
-            const auto& warnings = settingsImpl->GetWarnings();
-            hr = warnings.size() == 0 ? S_OK : S_FALSE;
+            if (_settings.GetLoadingError())
+            {
+                _settingsLoadExceptionText = _GetErrorText(_settings.GetLoadingError().Value());
+                return E_INVALIDARG;
+            }
+            else if (!_settings.GetSerializationErrorMessage().empty())
+            {
+                _settingsLoadExceptionText = _settings.GetSerializationErrorMessage();
+                return E_INVALIDARG;
+            }
+
+            hr = _settings.Warnings().Size() == 0 ? S_OK : S_FALSE;
         }
         catch (const winrt::hresult_error& e)
         {
@@ -641,17 +649,6 @@ namespace winrt::TerminalApp::implementation
             _settingsLoadExceptionText = e.message();
             LOG_HR(hr);
         }
-        catch (const ::TerminalApp::SettingsException& ex)
-        {
-            hr = E_INVALIDARG;
-            _settingsLoadExceptionText = _GetErrorText(ex.Error());
-        }
-        catch (const ::TerminalApp::SettingsTypedDeserializationException& e)
-        {
-            hr = E_INVALIDARG;
-            std::string_view what{ e.what() };
-            _settingsLoadExceptionText = til::u8u16(what);
-        }
         catch (...)
         {
             hr = wil::ResultFromCaughtException();
diff --git a/src/cascadia/TerminalApp/CascadiaSettings.cpp b/src/cascadia/TerminalApp/CascadiaSettings.cpp
index 66e2f8a2607..26c6b48da87 100644
--- a/src/cascadia/TerminalApp/CascadiaSettings.cpp
+++ b/src/cascadia/TerminalApp/CascadiaSettings.cpp
@@ -46,7 +46,9 @@ CascadiaSettings::CascadiaSettings() :
 // - addDynamicProfiles: if true, we'll add the built-in DPGs.
 CascadiaSettings::CascadiaSettings(const bool addDynamicProfiles) :
     _globals{ winrt::make_self<implementation::GlobalAppSettings>() },
-    _profiles{ winrt::single_threaded_observable_vector<TerminalApp::Profile>() }
+    _profiles{ winrt::single_threaded_observable_vector<TerminalApp::Profile>() },
+    _warnings{ winrt::single_threaded_vector<SettingsLoadWarnings>() },
+    _deserializationErrorMessage{ L"" }
 {
     if (addDynamicProfiles)
     {
@@ -119,9 +121,19 @@ winrt::TerminalApp::GlobalAppSettings CascadiaSettings::GlobalSettings()
 //   knew were bad when we called `_ValidateSettings` last.
 // Return Value:
 // - a reference to our list of warnings.
-std::vector<TerminalApp::SettingsLoadWarnings>& CascadiaSettings::GetWarnings()
+IVectorView<winrt::TerminalApp::SettingsLoadWarnings> CascadiaSettings::Warnings()
 {
-    return _warnings;
+    return _warnings.GetView();
+}
+
+winrt::Windows::Foundation::IReference<winrt::TerminalApp::SettingsLoadErrors> CascadiaSettings::GetLoadingError()
+{
+    return _loadError;
+}
+
+winrt::hstring CascadiaSettings::GetSerializationErrorMessage()
+{
+    return _deserializationErrorMessage;
 }
 
 // Method Description:
@@ -136,7 +148,7 @@ std::vector<TerminalApp::SettingsLoadWarnings>& CascadiaSettings::GetWarnings()
 // - <none>
 void CascadiaSettings::_ValidateSettings()
 {
-    _warnings.clear();
+    _warnings.Clear();
 
     // Make sure to check that profiles exists at all first and foremost:
     _ValidateProfilesExist();
@@ -198,7 +210,7 @@ void CascadiaSettings::_ValidateProfilesExist()
         // We can't add the warning to the list of warnings here, because this
         // object is not going to be returned at any point.
 
-        throw ::TerminalApp::SettingsException(::TerminalApp::SettingsLoadErrors::NoProfiles);
+        throw SettingsException(TerminalApp::SettingsLoadErrors::NoProfiles);
     }
 }
 
@@ -252,7 +264,7 @@ void CascadiaSettings::_ValidateDefaultProfileExists()
 
     if (nullDefaultProfile || defaultProfileNotInProfiles)
     {
-        _warnings.push_back(::TerminalApp::SettingsLoadWarnings::MissingDefaultProfile);
+        _warnings.Append(TerminalApp::SettingsLoadWarnings::MissingDefaultProfile);
         // Use the first profile as the new default
 
         // _temporarily_ set the default profile to the first profile. Because
@@ -295,7 +307,7 @@ void CascadiaSettings::_ValidateNoDuplicateProfiles()
 
     if (foundDupe)
     {
-        _warnings.push_back(::TerminalApp::SettingsLoadWarnings::DuplicateProfile);
+        _warnings.Append(TerminalApp::SettingsLoadWarnings::DuplicateProfile);
     }
 }
 
@@ -384,7 +396,7 @@ void CascadiaSettings::_RemoveHiddenProfiles()
     {
         // Throw an exception. This is an invalid state, and we want the app to
         // be able to gracefully use the default settings.
-        throw ::TerminalApp::SettingsException(::TerminalApp::SettingsLoadErrors::AllProfilesHidden);
+        throw SettingsException(TerminalApp::SettingsLoadErrors::AllProfilesHidden);
     }
 }
 
@@ -413,7 +425,7 @@ void CascadiaSettings::_ValidateAllSchemesExist()
 
     if (foundInvalidScheme)
     {
-        _warnings.push_back(::TerminalApp::SettingsLoadWarnings::UnknownColorScheme);
+        _warnings.Append(SettingsLoadWarnings::UnknownColorScheme);
     }
 }
 
@@ -468,12 +480,12 @@ void CascadiaSettings::_ValidateMediaResources()
 
     if (invalidBackground)
     {
-        _warnings.push_back(::TerminalApp::SettingsLoadWarnings::InvalidBackgroundImage);
+        _warnings.Append(TerminalApp::SettingsLoadWarnings::InvalidBackgroundImage);
     }
 
     if (invalidIcon)
     {
-        _warnings.push_back(::TerminalApp::SettingsLoadWarnings::InvalidIcon);
+        _warnings.Append(TerminalApp::SettingsLoadWarnings::InvalidIcon);
     }
 }
 
@@ -659,8 +671,11 @@ void CascadiaSettings::_ValidateKeybindings()
 
     if (!keybindingWarnings.empty())
     {
-        _warnings.push_back(::TerminalApp::SettingsLoadWarnings::AtLeastOneKeybindingWarning);
-        _warnings.insert(_warnings.end(), keybindingWarnings.begin(), keybindingWarnings.end());
+        _warnings.Append(TerminalApp::SettingsLoadWarnings::AtLeastOneKeybindingWarning);
+        for (auto warning : keybindingWarnings)
+        {
+            _warnings.Append(warning);
+        }
     }
 }
 
@@ -679,7 +694,7 @@ void CascadiaSettings::_ValidateNoGlobalsKey()
 {
     if (auto oldGlobalsProperty{ _userSettings["globals"] })
     {
-        _warnings.push_back(::TerminalApp::SettingsLoadWarnings::LegacyGlobalsProperty);
+        _warnings.Append(TerminalApp::SettingsLoadWarnings::LegacyGlobalsProperty);
     }
 }
 
diff --git a/src/cascadia/TerminalApp/CascadiaSettings.h b/src/cascadia/TerminalApp/CascadiaSettings.h
index d02704e30c6..3d07bcc7628 100644
--- a/src/cascadia/TerminalApp/CascadiaSettings.h
+++ b/src/cascadia/TerminalApp/CascadiaSettings.h
@@ -84,14 +84,18 @@ namespace winrt::TerminalApp::implementation
         TerminalApp::Profile FindProfile(guid profileGuid) const noexcept;
         TerminalApp::ColorScheme GetColorSchemeForProfile(const guid profileGuid) const;
 
-        std::vector<::TerminalApp::SettingsLoadWarnings>& GetWarnings();
+        Windows::Foundation::Collections::IVectorView<SettingsLoadWarnings> Warnings();
+        Windows::Foundation::IReference<SettingsLoadErrors> GetLoadingError();
+        hstring GetSerializationErrorMessage();
 
         bool ApplyColorScheme(Microsoft::Terminal::TerminalControl::IControlSettings settings, hstring schemeName);
 
     private:
         com_ptr<GlobalAppSettings> _globals;
         Windows::Foundation::Collections::IObservableVector<TerminalApp::Profile> _profiles;
-        std::vector<::TerminalApp::SettingsLoadWarnings> _warnings;
+        Windows::Foundation::Collections::IVector<TerminalApp::SettingsLoadWarnings> _warnings;
+        Windows::Foundation::IReference<SettingsLoadErrors> _loadError;
+        hstring _deserializationErrorMessage;
 
         std::vector<std::unique_ptr<::TerminalApp::IDynamicProfileGenerator>> _profileGenerators;
 
diff --git a/src/cascadia/TerminalApp/CascadiaSettings.idl b/src/cascadia/TerminalApp/CascadiaSettings.idl
index 58695b9dc31..d23b193b400 100644
--- a/src/cascadia/TerminalApp/CascadiaSettings.idl
+++ b/src/cascadia/TerminalApp/CascadiaSettings.idl
@@ -3,6 +3,7 @@
 
 import "GlobalAppSettings.idl";
 import "Profile.idl";
+import "TerminalWarnings.idl";
 
 namespace TerminalApp
 {
@@ -17,6 +18,10 @@ namespace TerminalApp
 
         AppKeyBindings Keybindings { get; };
 
+        Windows.Foundation.Collections.IVectorView<SettingsLoadWarnings> Warnings { get; };
+        Windows.Foundation.IReference<SettingsLoadErrors> GetLoadingError { get; };
+        String GetSerializationErrorMessage { get; };
+
         Profile FindProfile(Guid profileGuid);
         ColorScheme GetColorSchemeForProfile(Guid profileGuid);
     }
diff --git a/src/cascadia/TerminalApp/CascadiaSettingsSerialization.cpp b/src/cascadia/TerminalApp/CascadiaSettingsSerialization.cpp
index e34d10e25e8..13479fb25ee 100644
--- a/src/cascadia/TerminalApp/CascadiaSettingsSerialization.cpp
+++ b/src/cascadia/TerminalApp/CascadiaSettingsSerialization.cpp
@@ -18,7 +18,6 @@
 // Both defaults.h and userDefaults.h are generated at build time into the
 // "Generated Files" directory.
 
-using namespace ::TerminalApp;
 using namespace winrt::TerminalApp::implementation;
 using namespace ::Microsoft::Console;
 
@@ -103,145 +102,161 @@ static void _CatchRethrowSerializationExceptionWithLocationInfo(std::string_view
 // - a unique_ptr containing a new CascadiaSettings object.
 winrt::TerminalApp::CascadiaSettings CascadiaSettings::LoadAll()
 {
-    auto settings = LoadDefaults();
-    auto resultPtr = winrt::get_self<CascadiaSettings>(settings);
-
-    // GH 3588, we need this below to know if the user chose something that wasn't our default.
-    // Collect it up here in case it gets modified by any of the other layers between now and when
-    // the user's preferences are loaded and layered.
-    const auto hardcodedDefaultGuid = resultPtr->GlobalSettings().DefaultProfile();
-
-    std::optional<std::string> fileData = _ReadUserSettings();
-    const bool foundFile = fileData.has_value();
-
-    // Make sure the file isn't totally empty. If it is, we'll treat the file
-    // like it doesn't exist at all.
-    const bool fileHasData = foundFile && !fileData.value().empty();
-    bool needToWriteFile = false;
-    if (fileHasData)
+    try
     {
-        resultPtr->_ParseJsonString(fileData.value(), false);
-    }
+        auto settings = LoadDefaults();
+        auto resultPtr = winrt::get_self<CascadiaSettings>(settings);
 
-    // Load profiles from dynamic profile generators. _userSettings should be
-    // created by now, because we're going to check in there for any generators
-    // that should be disabled (if the user had any settings.)
-    resultPtr->_LoadDynamicProfiles();
+        // GH 3588, we need this below to know if the user chose something that wasn't our default.
+        // Collect it up here in case it gets modified by any of the other layers between now and when
+        // the user's preferences are loaded and layered.
+        const auto hardcodedDefaultGuid = resultPtr->GlobalSettings().DefaultProfile();
 
-    if (!fileHasData)
-    {
-        // We didn't find the user settings. We'll need to create a file
-        // to use as the user defaults.
-        // For now, just parse our user settings template as their user settings.
-        auto userSettings{ resultPtr->_ApplyFirstRunChangesToSettingsTemplate(UserSettingsJson) };
-        resultPtr->_ParseJsonString(userSettings, false);
-        needToWriteFile = true;
-    }
+        std::optional<std::string> fileData = _ReadUserSettings();
+        const bool foundFile = fileData.has_value();
 
-    try
-    {
-        // See microsoft/terminal#2325: find the defaultSettings from the user's
-        // settings. Layer those settings upon all the existing profiles we have
-        // (defaults and dynamic profiles). We'll also set
-        // _userDefaultProfileSettings here. When we LayerJson below to apply the
-        // user settings, we'll make sure to use these defaultSettings _before_ any
-        // profiles the user might have.
-        resultPtr->_ApplyDefaultsFromUserSettings();
-
-        // Apply the user's settings
-        resultPtr->LayerJson(resultPtr->_userSettings);
-    }
-    catch (...)
-    {
-        _CatchRethrowSerializationExceptionWithLocationInfo(resultPtr->_userSettingsString);
-    }
+        // Make sure the file isn't totally empty. If it is, we'll treat the file
+        // like it doesn't exist at all.
+        const bool fileHasData = foundFile && !fileData.value().empty();
+        bool needToWriteFile = false;
+        if (fileHasData)
+        {
+            resultPtr->_ParseJsonString(fileData.value(), false);
+        }
 
-    // After layering the user settings, check if there are any new profiles
-    // that need to be inserted into their user settings file.
-    needToWriteFile = resultPtr->_AppendDynamicProfilesToUserSettings() || needToWriteFile;
+        // Load profiles from dynamic profile generators. _userSettings should be
+        // created by now, because we're going to check in there for any generators
+        // that should be disabled (if the user had any settings.)
+        resultPtr->_LoadDynamicProfiles();
 
-    if (needToWriteFile)
-    {
-        // For safety's sake, we need to re-parse the JSON document to ensure that
-        // all future patches are applied with updated object offsets.
-        resultPtr->_ParseJsonString(resultPtr->_userSettingsString, false);
-    }
+        if (!fileHasData)
+        {
+            // We didn't find the user settings. We'll need to create a file
+            // to use as the user defaults.
+            // For now, just parse our user settings template as their user settings.
+            auto userSettings{ resultPtr->_ApplyFirstRunChangesToSettingsTemplate(UserSettingsJson) };
+            resultPtr->_ParseJsonString(userSettings, false);
+            needToWriteFile = true;
+        }
 
-    // Make sure there's a $schema at the top of the file.
-    needToWriteFile = resultPtr->_PrependSchemaDirective() || needToWriteFile;
+        try
+        {
+            // See microsoft/terminal#2325: find the defaultSettings from the user's
+            // settings. Layer those settings upon all the existing profiles we have
+            // (defaults and dynamic profiles). We'll also set
+            // _userDefaultProfileSettings here. When we LayerJson below to apply the
+            // user settings, we'll make sure to use these defaultSettings _before_ any
+            // profiles the user might have.
+            resultPtr->_ApplyDefaultsFromUserSettings();
+
+            // Apply the user's settings
+            resultPtr->LayerJson(resultPtr->_userSettings);
+        }
+        catch (...)
+        {
+            _CatchRethrowSerializationExceptionWithLocationInfo(resultPtr->_userSettingsString);
+        }
 
-    // TODO:GH#2721 If powershell core is installed, we need to set that to the
-    // default profile, but only when the settings file was newly created. We'll
-    // re-write the segment of the user settings for "default profile" to have
-    // the powershell core GUID instead.
+        // After layering the user settings, check if there are any new profiles
+        // that need to be inserted into their user settings file.
+        needToWriteFile = resultPtr->_AppendDynamicProfilesToUserSettings() || needToWriteFile;
 
-    // If we created the file, or found new dynamic profiles, write the user
-    // settings string back to the file.
-    if (needToWriteFile)
-    {
-        // If AppendDynamicProfilesToUserSettings (or the pwsh check above)
-        // changed the file, then our local settings JSON is no longer accurate.
-        // We should re-parse, but not re-layer
-        resultPtr->_ParseJsonString(resultPtr->_userSettingsString, false);
+        if (needToWriteFile)
+        {
+            // For safety's sake, we need to re-parse the JSON document to ensure that
+            // all future patches are applied with updated object offsets.
+            resultPtr->_ParseJsonString(resultPtr->_userSettingsString, false);
+        }
 
-        _WriteSettings(resultPtr->_userSettingsString);
-    }
+        // Make sure there's a $schema at the top of the file.
+        needToWriteFile = resultPtr->_PrependSchemaDirective() || needToWriteFile;
 
-    // If this throws, the app will catch it and use the default settings
-    resultPtr->_ValidateSettings();
+        // TODO:GH#2721 If powershell core is installed, we need to set that to the
+        // default profile, but only when the settings file was newly created. We'll
+        // re-write the segment of the user settings for "default profile" to have
+        // the powershell core GUID instead.
 
-    // GH 3855 - Gathering Data on custom profiles to inform better defaults
-    // Do it after everything else so it won't happen unless validation passed.
-    // Also, avoid processing unless someone's listening for measures. The keybindings work, at least,
-    // is a lot of computation we can skip if no one cares.
-    if (TraceLoggingProviderEnabled(g_hTerminalAppProvider, 0, MICROSOFT_KEYWORD_MEASURES))
-    {
-        const auto guid = resultPtr->GlobalSettings().DefaultProfile();
-
-        // Compare to the defaults.json one that we set on install.
-        // If it's different, log what the user chose.
-        if (hardcodedDefaultGuid != guid)
+        // If we created the file, or found new dynamic profiles, write the user
+        // settings string back to the file.
+        if (needToWriteFile)
         {
-            TraceLoggingWrite(
-                g_hTerminalAppProvider, // handle to TerminalApp tracelogging provider
-                "CustomDefaultProfile",
-                TraceLoggingDescription("Event emitted when user has chosen a different default profile than hardcoded one on load/reload"),
-                TraceLoggingGuid(guid, "DefaultProfile", "ID of user-chosen default profile"),
-                TraceLoggingKeyword(MICROSOFT_KEYWORD_MEASURES),
-                TelemetryPrivacyDataTag(PDT_ProductAndServiceUsage));
+            // If AppendDynamicProfilesToUserSettings (or the pwsh check above)
+            // changed the file, then our local settings JSON is no longer accurate.
+            // We should re-parse, but not re-layer
+            resultPtr->_ParseJsonString(resultPtr->_userSettingsString, false);
+
+            _WriteSettings(resultPtr->_userSettingsString);
         }
 
-        // If the user had keybinding settings preferences, we want to learn from them to make better defaults
-        auto userKeybindings = resultPtr->_userSettings[JsonKey(KeybindingsKey)];
-        if (!userKeybindings.empty())
+        // If this throws, the app will catch it and use the default settings
+        resultPtr->_ValidateSettings();
+
+        // GH 3855 - Gathering Data on custom profiles to inform better defaults
+        // Do it after everything else so it won't happen unless validation passed.
+        // Also, avoid processing unless someone's listening for measures. The keybindings work, at least,
+        // is a lot of computation we can skip if no one cares.
+        if (TraceLoggingProviderEnabled(g_hTerminalAppProvider, 0, MICROSOFT_KEYWORD_MEASURES))
         {
-            // If there are custom key bindings, let's understand what they are because maybe the defaults aren't good enough
-
-            // Run it through the object so we can parse it apart and then only serialize the fields we're interested in
-            // and avoid extraneous data.
-            auto akb = winrt::make_self<AppKeyBindings>();
-            akb->LayerJson(userKeybindings);
-            auto value = akb->ToJson();
-
-            // Reserialize the keybindings
-            Json::StreamWriterBuilder wbuilder;
-            // Use 4 spaces to indent instead of \t
-            wbuilder.settings_["indentation"] = "    ";
-            wbuilder.settings_["enableYAMLCompatibility"] = true; // suppress spaces around colons
-
-            const auto keybindingsString = Json::writeString(wbuilder, value);
-
-            TraceLoggingWrite(
-                g_hTerminalAppProvider, // handle to TerminalApp tracelogging provider
-                "CustomKeybindings",
-                TraceLoggingDescription("Event emitted when custom keybindings are identified on load/reload"),
-                TraceLoggingUtf8String(keybindingsString.c_str(), "Keybindings", "Keybindings as JSON"),
-                TraceLoggingKeyword(MICROSOFT_KEYWORD_MEASURES),
-                TelemetryPrivacyDataTag(PDT_ProductAndServiceUsage));
+            const auto guid = resultPtr->GlobalSettings().DefaultProfile();
+
+            // Compare to the defaults.json one that we set on install.
+            // If it's different, log what the user chose.
+            if (hardcodedDefaultGuid != guid)
+            {
+                TraceLoggingWrite(
+                    g_hTerminalAppProvider, // handle to TerminalApp tracelogging provider
+                    "CustomDefaultProfile",
+                    TraceLoggingDescription("Event emitted when user has chosen a different default profile than hardcoded one on load/reload"),
+                    TraceLoggingGuid(guid, "DefaultProfile", "ID of user-chosen default profile"),
+                    TraceLoggingKeyword(MICROSOFT_KEYWORD_MEASURES),
+                    TelemetryPrivacyDataTag(PDT_ProductAndServiceUsage));
+            }
+
+            // If the user had keybinding settings preferences, we want to learn from them to make better defaults
+            auto userKeybindings = resultPtr->_userSettings[JsonKey(KeybindingsKey)];
+            if (!userKeybindings.empty())
+            {
+                // If there are custom key bindings, let's understand what they are because maybe the defaults aren't good enough
+
+                // Run it through the object so we can parse it apart and then only serialize the fields we're interested in
+                // and avoid extraneous data.
+                auto akb = winrt::make_self<AppKeyBindings>();
+                akb->LayerJson(userKeybindings);
+                auto value = akb->ToJson();
+
+                // Reserialize the keybindings
+                Json::StreamWriterBuilder wbuilder;
+                // Use 4 spaces to indent instead of \t
+                wbuilder.settings_["indentation"] = "    ";
+                wbuilder.settings_["enableYAMLCompatibility"] = true; // suppress spaces around colons
+
+                const auto keybindingsString = Json::writeString(wbuilder, value);
+
+                TraceLoggingWrite(
+                    g_hTerminalAppProvider, // handle to TerminalApp tracelogging provider
+                    "CustomKeybindings",
+                    TraceLoggingDescription("Event emitted when custom keybindings are identified on load/reload"),
+                    TraceLoggingUtf8String(keybindingsString.c_str(), "Keybindings", "Keybindings as JSON"),
+                    TraceLoggingKeyword(MICROSOFT_KEYWORD_MEASURES),
+                    TelemetryPrivacyDataTag(PDT_ProductAndServiceUsage));
+            }
         }
-    }
 
-    return *resultPtr;
+        return *resultPtr;
+    }
+    catch (const SettingsException& ex)
+    {
+        auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
+        settings->_loadError = ex.Error();
+        return *settings;
+    }
+    catch (const SettingsTypedDeserializationException& e)
+    {
+        auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
+        std::string_view what{ e.what() };
+        settings->_deserializationErrorMessage = til::u8u16(what);
+        return *settings;
+    }
 }
 
 // Function Description:
@@ -255,16 +270,32 @@ winrt::TerminalApp::CascadiaSettings CascadiaSettings::LoadUniversal()
     // We're going to do this ourselves because we want to exclude almost everything
     // from the special Universal-for-developers configuration
 
-    // Create settings and get the universal defaults loaded up.
-    auto resultPtr = winrt::make_self<CascadiaSettings>();
-    resultPtr->_ParseJsonString(DefaultUniversalJson, true);
-    resultPtr->LayerJson(resultPtr->_defaultSettings);
+    try
+    {
+        // Create settings and get the universal defaults loaded up.
+        auto resultPtr = winrt::make_self<CascadiaSettings>();
+        resultPtr->_ParseJsonString(DefaultUniversalJson, true);
+        resultPtr->LayerJson(resultPtr->_defaultSettings);
 
-    // Now validate.
-    // If this throws, the app will catch it and use the default settings
-    resultPtr->_ValidateSettings();
+        // Now validate.
+        // If this throws, the app will catch it and use the default settings
+        resultPtr->_ValidateSettings();
 
-    return *resultPtr;
+        return *resultPtr;
+    }
+    catch (const SettingsException& ex)
+    {
+        auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
+        settings->_loadError = ex.Error();
+        return *settings;
+    }
+    catch (const SettingsTypedDeserializationException& e)
+    {
+        auto settings{ winrt::make_self<implementation::CascadiaSettings>() };
+        std::string_view what{ e.what() };
+        settings->_deserializationErrorMessage = til::u8u16(what);
+        return *settings;
+    }
 }
 
 // Function Description:
@@ -276,7 +307,7 @@ winrt::TerminalApp::CascadiaSettings CascadiaSettings::LoadUniversal()
 // - a unique_ptr to a CascadiaSettings with the settings from defaults.json
 winrt::TerminalApp::CascadiaSettings CascadiaSettings::LoadDefaults()
 {
-    auto resultPtr = winrt::make_self<CascadiaSettings>();
+    auto resultPtr{ winrt::make_self<CascadiaSettings>() };
 
     // We already have the defaults in memory, because we stamp them into a
     // header as part of the build process. We don't need to bother with reading
diff --git a/src/cascadia/TerminalApp/Command.cpp b/src/cascadia/TerminalApp/Command.cpp
index 014058d4bca..03b452e705f 100644
--- a/src/cascadia/TerminalApp/Command.cpp
+++ b/src/cascadia/TerminalApp/Command.cpp
@@ -187,7 +187,7 @@ namespace winrt::TerminalApp::implementation
     // Return Value:
     // - the newly constructed Command object.
     winrt::com_ptr<Command> Command::FromJson(const Json::Value& json,
-                                              std::vector<::TerminalApp::SettingsLoadWarnings>& warnings)
+                                              std::vector<SettingsLoadWarnings>& warnings)
     {
         auto result = winrt::make_self<Command>();
 
@@ -280,10 +280,10 @@ namespace winrt::TerminalApp::implementation
     // - json: A Json::Value containing an array of serialized commands
     // Return Value:
     // - A vector containing any warnings detected while parsing
-    std::vector<::TerminalApp::SettingsLoadWarnings> Command::LayerJson(Windows::Foundation::Collections::IMap<winrt::hstring, winrt::TerminalApp::Command>& commands,
-                                                                        const Json::Value& json)
+    std::vector<SettingsLoadWarnings> Command::LayerJson(Windows::Foundation::Collections::IMap<winrt::hstring, winrt::TerminalApp::Command>& commands,
+                                                         const Json::Value& json)
     {
-        std::vector<::TerminalApp::SettingsLoadWarnings> warnings;
+        std::vector<SettingsLoadWarnings> warnings;
 
         for (const auto& value : json)
         {
@@ -355,7 +355,7 @@ namespace winrt::TerminalApp::implementation
     void Command::ExpandCommands(Windows::Foundation::Collections::IMap<winrt::hstring, winrt::TerminalApp::Command>& commands,
                                  Windows::Foundation::Collections::IVectorView<winrt::TerminalApp::Profile> profiles,
                                  gsl::span<winrt::TerminalApp::ColorScheme> schemes,
-                                 std::vector<::TerminalApp::SettingsLoadWarnings>& warnings)
+                                 std::vector<SettingsLoadWarnings>& warnings)
     {
         std::vector<winrt::hstring> commandsToRemove;
         std::vector<winrt::TerminalApp::Command> commandsToAdd;
@@ -411,7 +411,7 @@ namespace winrt::TerminalApp::implementation
     std::vector<winrt::TerminalApp::Command> Command::_expandCommand(Command* const expandable,
                                                                      Windows::Foundation::Collections::IVectorView<winrt::TerminalApp::Profile> profiles,
                                                                      gsl::span<winrt::TerminalApp::ColorScheme> schemes,
-                                                                     std::vector<::TerminalApp::SettingsLoadWarnings>& warnings)
+                                                                     std::vector<SettingsLoadWarnings>& warnings)
     {
         std::vector<winrt::TerminalApp::Command> newCommands;
 
@@ -438,7 +438,7 @@ namespace winrt::TerminalApp::implementation
             const auto actualDataEnd = newJsonString.data() + newJsonString.size();
             if (!reader->parse(actualDataStart, actualDataEnd, &newJsonValue, &errs))
             {
-                warnings.push_back(::TerminalApp::SettingsLoadWarnings::FailedToParseCommandJson);
+                warnings.push_back(SettingsLoadWarnings::FailedToParseCommandJson);
                 // If we encounter a re-parsing error, just stop processing the rest of the commands.
                 return false;
             }
diff --git a/src/cascadia/TerminalApp/Command.h b/src/cascadia/TerminalApp/Command.h
index 2b8e62a6044..a89f10ed78b 100644
--- a/src/cascadia/TerminalApp/Command.h
+++ b/src/cascadia/TerminalApp/Command.h
@@ -38,15 +38,15 @@ namespace winrt::TerminalApp::implementation
         Command();
 
         static winrt::com_ptr<Command> FromJson(const Json::Value& json,
-                                                std::vector<::TerminalApp::SettingsLoadWarnings>& warnings);
+                                                std::vector<TerminalApp::SettingsLoadWarnings>& warnings);
 
         static void ExpandCommands(Windows::Foundation::Collections::IMap<winrt::hstring, winrt::TerminalApp::Command>& commands,
                                    Windows::Foundation::Collections::IVectorView<winrt::TerminalApp::Profile> profiles,
                                    gsl::span<winrt::TerminalApp::ColorScheme> schemes,
-                                   std::vector<::TerminalApp::SettingsLoadWarnings>& warnings);
+                                   std::vector<TerminalApp::SettingsLoadWarnings>& warnings);
 
-        static std::vector<::TerminalApp::SettingsLoadWarnings> LayerJson(Windows::Foundation::Collections::IMap<winrt::hstring, winrt::TerminalApp::Command>& commands,
-                                                                          const Json::Value& json);
+        static std::vector<TerminalApp::SettingsLoadWarnings> LayerJson(Windows::Foundation::Collections::IMap<winrt::hstring, winrt::TerminalApp::Command>& commands,
+                                                                        const Json::Value& json);
         bool HasNestedCommands();
         Windows::Foundation::Collections::IMapView<winrt::hstring, TerminalApp::Command> NestedCommands();
 
@@ -71,7 +71,7 @@ namespace winrt::TerminalApp::implementation
         static std::vector<winrt::TerminalApp::Command> _expandCommand(Command* const expandable,
                                                                        Windows::Foundation::Collections::IVectorView<winrt::TerminalApp::Profile> profiles,
                                                                        gsl::span<winrt::TerminalApp::ColorScheme> schemes,
-                                                                       std::vector<::TerminalApp::SettingsLoadWarnings>& warnings);
+                                                                       std::vector<TerminalApp::SettingsLoadWarnings>& warnings);
         friend class TerminalAppLocalTests::SettingsTests;
         friend class TerminalAppLocalTests::CommandTests;
     };
diff --git a/src/cascadia/TerminalApp/GlobalAppSettings.cpp b/src/cascadia/TerminalApp/GlobalAppSettings.cpp
index 7507e83bdc6..7a5b1aa43b5 100644
--- a/src/cascadia/TerminalApp/GlobalAppSettings.cpp
+++ b/src/cascadia/TerminalApp/GlobalAppSettings.cpp
@@ -218,7 +218,7 @@ void GlobalAppSettings::AddColorScheme(const winrt::TerminalApp::ColorScheme& sc
 // - <none>
 // Return Value:
 // - <none>
-std::vector<TerminalApp::SettingsLoadWarnings> GlobalAppSettings::GetKeybindingsWarnings() const
+std::vector<winrt::TerminalApp::SettingsLoadWarnings> GlobalAppSettings::GetKeybindingsWarnings() const
 {
     return _keybindingsWarnings;
 }
diff --git a/src/cascadia/TerminalApp/GlobalAppSettings.h b/src/cascadia/TerminalApp/GlobalAppSettings.h
index 82d385a9434..59a3cc541b7 100644
--- a/src/cascadia/TerminalApp/GlobalAppSettings.h
+++ b/src/cascadia/TerminalApp/GlobalAppSettings.h
@@ -45,7 +45,7 @@ namespace winrt::TerminalApp::implementation
 
         void ApplyToSettings(const TerminalApp::TerminalSettings& settings) const noexcept;
 
-        std::vector<::TerminalApp::SettingsLoadWarnings> GetKeybindingsWarnings() const;
+        std::vector<TerminalApp::SettingsLoadWarnings> GetKeybindingsWarnings() const;
 
         Windows::Foundation::Collections::IMapView<hstring, TerminalApp::Command> GetCommands() noexcept;
 
@@ -84,7 +84,7 @@ namespace winrt::TerminalApp::implementation
         guid _defaultProfile;
 
         com_ptr<AppKeyBindings> _keybindings;
-        std::vector<::TerminalApp::SettingsLoadWarnings> _keybindingsWarnings;
+        std::vector<TerminalApp::SettingsLoadWarnings> _keybindingsWarnings;
 
         Windows::Foundation::Collections::IMap<hstring, TerminalApp::ColorScheme> _colorSchemes;
         Windows::Foundation::Collections::IMap<hstring, TerminalApp::Command> _commands;
diff --git a/src/cascadia/TerminalApp/TerminalAppLib.vcxproj b/src/cascadia/TerminalApp/TerminalAppLib.vcxproj
index 46cc4bd46bc..8813262396d 100644
--- a/src/cascadia/TerminalApp/TerminalAppLib.vcxproj
+++ b/src/cascadia/TerminalApp/TerminalAppLib.vcxproj
@@ -122,7 +122,9 @@
     <ClInclude Include="Utils.h" />
     <ClInclude Include="DefaultProfileUtils.h" />
     <ClInclude Include="TerminalSettingsSerializationHelpers.h" />
-    <ClInclude Include="TerminalWarnings.h" />
+    <ClInclude Include="TerminalWarnings.h">
+      <DependentUpon>TerminalWarnings.idl</DependentUpon>
+    </ClInclude>
     <ClInclude Include="IDynamicProfileGenerator.h" />
     <ClInclude Include="PowershellCoreProfileGenerator.h" />
     <ClInclude Include="WslDistroGenerator.h" />
@@ -295,6 +297,7 @@
     <Midl Include="Profile.idl" />
     <Midl Include="GlobalAppSettings.idl" />
     <Midl Include="CascadiaSettings.idl" />
+    <Midl Include="TerminalWarnings.idl" />
   </ItemGroup>
   <!-- ========================= Misc Files ======================== -->
   <ItemGroup>
diff --git a/src/cascadia/TerminalApp/TerminalPage.cpp b/src/cascadia/TerminalApp/TerminalPage.cpp
index f7d377b278e..25b3e0dc291 100644
--- a/src/cascadia/TerminalApp/TerminalPage.cpp
+++ b/src/cascadia/TerminalApp/TerminalPage.cpp
@@ -2120,7 +2120,7 @@ namespace winrt::TerminalApp::implementation
                                                                                     IVectorView<winrt::TerminalApp::Profile> profiles,
                                                                                     IMapView<winrt::hstring, winrt::TerminalApp::ColorScheme> schemes)
     {
-        std::vector<::TerminalApp::SettingsLoadWarnings> warnings;
+        std::vector<TerminalApp::SettingsLoadWarnings> warnings;
 
         std::vector<winrt::TerminalApp::ColorScheme> sortedSchemes;
         sortedSchemes.reserve(schemes.Size());
diff --git a/src/cascadia/TerminalApp/TerminalWarnings.h b/src/cascadia/TerminalApp/TerminalWarnings.h
index 3b0be2b4022..57250be7d8a 100644
--- a/src/cascadia/TerminalApp/TerminalWarnings.h
+++ b/src/cascadia/TerminalApp/TerminalWarnings.h
@@ -15,34 +15,8 @@ Author(s):
 --*/
 #pragma once
 
-namespace TerminalApp
+namespace winrt::TerminalApp::implementation
 {
-    // SettingsLoadWarnings are scenarios where the settings contained
-    // information we knew was invalid, but we could recover from.
-    enum class SettingsLoadWarnings : uint32_t
-    {
-        MissingDefaultProfile = 0,
-        DuplicateProfile = 1,
-        UnknownColorScheme = 2,
-        InvalidBackgroundImage = 3,
-        InvalidIcon = 4,
-        AtLeastOneKeybindingWarning = 5,
-        TooManyKeysForChord = 6,
-        MissingRequiredParameter = 7,
-        LegacyGlobalsProperty = 8,
-        FailedToParseCommandJson = 9,
-        WARNINGS_SIZE // IMPORTANT: This MUST be the last value in this enum. It's an unused placeholder.
-    };
-
-    // SettingsLoadWarnings are scenarios where the settings had invalid state
-    // that we could not recover from.
-    enum class SettingsLoadErrors : uint32_t
-    {
-        NoProfiles = 0,
-        AllProfilesHidden = 1,
-        ERRORS_SIZE // IMPORTANT: This MUST be the last value in this enum. It's an unused placeholder.
-    };
-
     // This is a helper class to wrap up a SettingsLoadErrors into a proper
     // exception type.
     class SettingsException : public std::runtime_error
diff --git a/src/cascadia/TerminalApp/TerminalWarnings.idl b/src/cascadia/TerminalApp/TerminalWarnings.idl
new file mode 100644
index 00000000000..fd4558ad6cb
--- /dev/null
+++ b/src/cascadia/TerminalApp/TerminalWarnings.idl
@@ -0,0 +1,32 @@
+// Copyright (c) Microsoft Corporation
+// Licensed under the MIT license.
+#pragma once
+
+namespace TerminalApp
+{
+    // SettingsLoadWarnings are scenarios where the settings contained
+    // information we knew was invalid, but we could recover from.
+    enum SettingsLoadWarnings
+    {
+        MissingDefaultProfile = 0,
+        DuplicateProfile = 1,
+        UnknownColorScheme = 2,
+        InvalidBackgroundImage = 3,
+        InvalidIcon = 4,
+        AtLeastOneKeybindingWarning = 5,
+        TooManyKeysForChord = 6,
+        MissingRequiredParameter = 7,
+        LegacyGlobalsProperty = 8,
+        FailedToParseCommandJson = 9,
+        WARNINGS_SIZE // IMPORTANT: This MUST be the last value in this enum. It's an unused placeholder.
+    };
+
+    // SettingsLoadWarnings are scenarios where the settings had invalid state
+    // that we could not recover from.
+    enum SettingsLoadErrors
+    {
+        NoProfiles = 0,
+        AllProfilesHidden = 1,
+        ERRORS_SIZE // IMPORTANT: This MUST be the last value in this enum. It's an unused placeholder.
+    };
+}