diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/AgentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/AgentsStubSettings.java
index ae9ff987b..27b93ef37 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/AgentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/AgentsStubSettings.java
@@ -259,6 +259,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -437,6 +442,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EntityTypesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EntityTypesStubSettings.java
index b6bcd0a04..0832ce14a 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EntityTypesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EntityTypesStubSettings.java
@@ -211,6 +211,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -357,6 +362,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EnvironmentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EnvironmentsStubSettings.java
index b63e93398..d8c63250b 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EnvironmentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/EnvironmentsStubSettings.java
@@ -437,6 +437,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -632,6 +637,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/ExperimentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/ExperimentsStubSettings.java
index 42a437e7d..bc14d142d 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/ExperimentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/ExperimentsStubSettings.java
@@ -225,6 +225,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -385,6 +390,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/FlowsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/FlowsStubSettings.java
index ec88ab327..af8d89612 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/FlowsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/FlowsStubSettings.java
@@ -273,6 +273,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -462,6 +467,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/IntentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/IntentsStubSettings.java
index 138d8c7e2..035c04ee0 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/IntentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/IntentsStubSettings.java
@@ -205,6 +205,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -347,6 +352,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/PagesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/PagesStubSettings.java
index f2f190004..1c11a30ff 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/PagesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/PagesStubSettings.java
@@ -205,6 +205,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -347,6 +352,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SecuritySettingsServiceStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SecuritySettingsServiceStubSettings.java
index 5d6cd412d..8334e97d9 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SecuritySettingsServiceStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SecuritySettingsServiceStubSettings.java
@@ -233,6 +233,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -384,6 +389,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionEntityTypesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionEntityTypesStubSettings.java
index 8e038c0af..f3ccdd86e 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionEntityTypesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionEntityTypesStubSettings.java
@@ -238,6 +238,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -389,6 +394,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionsStubSettings.java
index 0c6f142c4..df92e82ae 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/SessionsStubSettings.java
@@ -139,6 +139,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -296,6 +301,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TestCasesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TestCasesStubSettings.java
index fca9817f5..094222339 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TestCasesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TestCasesStubSettings.java
@@ -378,6 +378,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -598,6 +603,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TransitionRouteGroupsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TransitionRouteGroupsStubSettings.java
index 4c34633cd..87291904a 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TransitionRouteGroupsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/TransitionRouteGroupsStubSettings.java
@@ -244,6 +244,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -398,6 +403,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/VersionsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/VersionsStubSettings.java
index 49ec302ac..b4655f4ac 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/VersionsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/VersionsStubSettings.java
@@ -235,6 +235,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -394,6 +399,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/WebhooksStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/WebhooksStubSettings.java
index a33affe28..e6851ba4f 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/WebhooksStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3/stub/WebhooksStubSettings.java
@@ -206,6 +206,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -348,6 +353,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/AgentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/AgentsStubSettings.java
index a088c1aa7..a57b0e790 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/AgentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/AgentsStubSettings.java
@@ -260,6 +260,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -438,6 +443,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EntityTypesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EntityTypesStubSettings.java
index 2cdb0fcaf..8c407ffc0 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EntityTypesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EntityTypesStubSettings.java
@@ -212,6 +212,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -358,6 +363,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EnvironmentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EnvironmentsStubSettings.java
index 97fa70c9f..353924a4f 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EnvironmentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/EnvironmentsStubSettings.java
@@ -438,6 +438,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -633,6 +638,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/ExperimentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/ExperimentsStubSettings.java
index bfe141a2c..c1aaa9d95 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/ExperimentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/ExperimentsStubSettings.java
@@ -226,6 +226,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -386,6 +391,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/FlowsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/FlowsStubSettings.java
index ef63bdb25..42377bc51 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/FlowsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/FlowsStubSettings.java
@@ -274,6 +274,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -463,6 +468,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/IntentsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/IntentsStubSettings.java
index dd7a4ba97..a35795e74 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/IntentsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/IntentsStubSettings.java
@@ -206,6 +206,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -348,6 +353,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/PagesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/PagesStubSettings.java
index d884846e4..ebe0cfe1a 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/PagesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/PagesStubSettings.java
@@ -206,6 +206,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -348,6 +353,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SecuritySettingsServiceStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SecuritySettingsServiceStubSettings.java
index 6d49150f3..2e35712a0 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SecuritySettingsServiceStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SecuritySettingsServiceStubSettings.java
@@ -234,6 +234,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -385,6 +390,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionEntityTypesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionEntityTypesStubSettings.java
index 5ae72b4eb..5002b9442 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionEntityTypesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionEntityTypesStubSettings.java
@@ -239,6 +239,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -390,6 +395,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionsStubSettings.java
index d7f70da6c..b92b6f2ba 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/SessionsStubSettings.java
@@ -140,6 +140,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -297,6 +302,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TestCasesStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TestCasesStubSettings.java
index 52853eb92..58b32531f 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TestCasesStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TestCasesStubSettings.java
@@ -379,6 +379,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -599,6 +604,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TransitionRouteGroupsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TransitionRouteGroupsStubSettings.java
index 6eb80e34e..93c99781a 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TransitionRouteGroupsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/TransitionRouteGroupsStubSettings.java
@@ -245,6 +245,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -399,6 +404,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/VersionsStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/VersionsStubSettings.java
index 7391f1169..c33ba79f9 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/VersionsStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/VersionsStubSettings.java
@@ -236,6 +236,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -395,6 +400,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/WebhooksStubSettings.java b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/WebhooksStubSettings.java
index 82b3a2cb0..1ee87bdd7 100644
--- a/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/WebhooksStubSettings.java
+++ b/google-cloud-dialogflow-cx/src/main/java/com/google/cloud/dialogflow/cx/v3beta1/stub/WebhooksStubSettings.java
@@ -207,6 +207,11 @@ public static String getDefaultEndpoint() {
     return "dialogflow.googleapis.com:443";
   }
 
+  /** Returns the default mTLS service endpoint. */
+  public static String getDefaultMtlsEndpoint() {
+    return "dialogflow.mtls.googleapis.com:443";
+  }
+
   /** Returns the default service scopes. */
   public static List<String> getDefaultServiceScopes() {
     return DEFAULT_SERVICE_SCOPES;
@@ -349,6 +354,8 @@ private static Builder createDefault() {
       builder.setCredentialsProvider(defaultCredentialsProviderBuilder().build());
       builder.setInternalHeaderProvider(defaultApiClientHeaderProviderBuilder().build());
       builder.setEndpoint(getDefaultEndpoint());
+      builder.setMtlsEndpoint(getDefaultMtlsEndpoint());
+      builder.setSwitchToMtlsEndpointAllowed(true);
 
       return initDefaults(builder);
     }
diff --git a/synth.metadata b/synth.metadata
index a637bb834..ecf0c5872 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,23 +4,23 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-dialogflow-cx.git",
-        "sha": "a2a78bf77ae137b54221af74bb4785adffa18f6a"
+        "sha": "e52f20e59643b79b23b98f79fa255a4880472ce1"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "9e3105549a35520f215359065c11e8dce15e18af",
-        "internalRef": "378266372"
+        "sha": "08c4eeb531c01ad031134dca94b18e3f7dd35902",
+        "internalRef": "378718217"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "9e3105549a35520f215359065c11e8dce15e18af",
-        "internalRef": "378266372"
+        "sha": "08c4eeb531c01ad031134dca94b18e3f7dd35902",
+        "internalRef": "378718217"
       }
     },
     {