Merge pull request #86654 from cephalin/issue#36380

#36380

Author: PRMerger17

articles/app-service/app-service-web-tutorial-connect-msi.md

@@ -170,7 +170,7 @@ conn.AccessToken = (new Microsoft.Azure.Services.AppAuthentication.AzureServiceT
 > [!TIP]
 > This demonstration code is synchronous for clarity. For more information, see [Asynchronous guide for constructors](https://github.com/davidfowl/AspNetCoreDiagnosticScenarios/blob/master/AsyncGuidance.md#constructors).
 
-That's every thing you need to connect to SQL Database. When debugging in Visual Studio, your code uses the Azure AD user you configured in [Set up Visual Studio](#set-up-visual-studio). You'll set up the SQL Database server later to allow connection from the managed identity of your App Service app.
+That's every thing you need to connect to SQL Database. When debugging in Visual Studio, your code uses the Azure AD user you configured in [Set up Visual Studio](#set-up-visual-studio). You'll set up the SQL Database server later to allow connection from the managed identity of your App Service app. The `AzureServiceTokenProvider` class caches the token in memory and retrieves it from Azure AD just before expiration. You don't need any custom code to refresh the token.
 
 Type `Ctrl+F5` to run the app again. The same CRUD app in your browser is now connecting to the Azure SQL Database directly, using Azure AD authentication. This setup lets you run database migrations from Visual Studio.