Fixed the authentication issue when using FederatedToken in non-Azure public Cloud Environment (#23769) (#23829)

* Fixed the authentication issue when using FederatedToken in non-Azure public Cloud Environment

Fix #23742

* Update ChangeLog.md

---------

Co-authored-by: Yeming Liu <[email protected]>

Author: msJinLei

src/Accounts/Accounts/ChangeLog.md

@@ -19,6 +19,7 @@
 -->
 
 ## Upcoming Release
+* Fixed the authentication issue when using `FederatedToken` in Sovereign Clouds. [#23742]
 * Added upcoming breaking change warning for deprecation of config parameter `DisableErrorRecordsPersistence`.
 
 ## Version 2.13.2

src/Accounts/Authenticators/ClientAssertionAuthenticator.cs

@@ -42,6 +42,7 @@ public override Task<IAccessToken> Authenticate(AuthenticationParameters paramet
 
             var options = new ClientAssertionCredentialOptions()
             {
+                AuthorityHost = new Uri(authority),
                 TokenCachePersistenceOptions = spParameters.TokenCacheProvider.GetTokenCachePersistenceOptions()
             };
             options.Diagnostics.IsTelemetryEnabled = false; // disable telemetry to avoid error thrown from Azure.Core that AssemblyInformationalVersion is null