Merge pull request #104323 from yaronpri/patch-2

Emphasis the need of specific managed identity

Author: Jak-MS

articles/container-apps/managed-identity.md

@@ -170,6 +170,9 @@ With managed identities, an app can obtain tokens to access Azure resources that
 
 Container Apps provides an internally accessible [REST endpoint](managed-identity.md?tabs=cli%2Chttp#rest-endpoint-reference) to retrieve tokens. The REST endpoint can be accessed from within the app with a standard HTTP GET, which can be implemented with a generic HTTP client in every language. For .NET, JavaScript, Java, and Python, the Azure Identity client library provides an abstraction over this REST endpoint. Connecting to other Azure services is as simple as adding a credential object to the service-specific client.
 
+> [!NOTE]
+> When using Azure Identity client library, the user-assigned managed identity client id must be specified.
+
 # [.NET](#tab/dotnet)
 
 > [!NOTE]