diff --git a/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.test.ts b/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.test.ts
index c9553930e6..66f650dd44 100644
--- a/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.test.ts
+++ b/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.test.ts
@@ -10,6 +10,7 @@ import {
   mockEndpointLogin,
 } from './__fixtures__/mockServices';
 import type {
+  Actions,
   AllowedActions,
   AuthenticationControllerState,
 } from './AuthenticationController';
@@ -271,7 +272,7 @@ describe('authentication/authentication-controller - getSessionProfile() tests',
  * @returns Auth Messenger
  */
 function createAuthenticationMessenger() {
-  const messenger = new ControllerMessenger<AllowedActions, never>();
+  const messenger = new ControllerMessenger<Actions | AllowedActions, never>();
   return messenger.getRestricted({
     name: 'AuthenticationController',
     allowedActions: [`SnapController:handleRequest`],
@@ -310,13 +311,9 @@ function createMockAuthenticationMessenger() {
       );
     }
 
-    const exhaustedMessengerMocks = (action: never) => {
-      throw new Error(
-        `MOCK_FAIL - unsupported messenger call: ${action as string}`,
-      );
-    };
-
-    return exhaustedMessengerMocks(actionType);
+    throw new Error(
+      `MOCK_FAIL - unsupported messenger call: ${actionType as string}`,
+    );
   });
 
   return { messenger, mockSnapGetPublicKey, mockSnapSignMessage };
diff --git a/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.ts b/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.ts
index 5eed4c09b6..fa9730e0e4 100644
--- a/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.ts
+++ b/packages/profile-sync-controller/src/controllers/authentication/AuthenticationController.ts
@@ -5,7 +5,6 @@ import type {
 import { BaseController } from '@metamask/base-controller';
 import type { HandleSnapRequest } from '@metamask/snaps-controllers';
 
-import type { UserStorageControllerDisableProfileSyncing } from '../user-storage/UserStorageController';
 import {
   createSnapPublicKeyRequest,
   createSnapSignMessageRequest,
@@ -88,9 +87,7 @@ export type AuthenticationControllerGetSessionProfile =
 export type AuthenticationControllerIsSignedIn = ActionsObj['isSignedIn'];
 
 // Allowed Actions
-export type AllowedActions =
-  | HandleSnapRequest
-  | UserStorageControllerDisableProfileSyncing;
+export type AllowedActions = HandleSnapRequest;
 
 // Messenger
 export type AuthenticationControllerMessenger = RestrictedControllerMessenger<
@@ -281,10 +278,6 @@ export default class AuthenticationController extends BaseController<
       };
     } catch (e) {
       console.error('Failed to authenticate', e);
-      // Disable Profile Syncing
-      await this.messagingSystem.call(
-        'UserStorageController:disableProfileSyncing',
-      );
       const errorMessage =
         e instanceof Error ? e.message : JSON.stringify(e ?? '');
       throw new Error(