Merge pull request #197430 from rwike77/patch-8

ADAL deprecation

Author: PRMerger15

articles/cdn/cdn-app-dev-net.md

@@ -37,6 +37,9 @@ You need Visual Studio 2015 to complete this tutorial.  [Visual Studio Community
 ## Create your project and add Nuget packages
 Now that we've created a resource group for our CDN profiles and given our Azure AD application permission to manage CDN profiles and endpoints within that group, we can start creating our application.
 
+> [!IMPORTANT]
+> The [Microsoft.IdentityModel.Clients.ActiveDirectory](https://www.nuget.org/packages/Microsoft.IdentityModel.Clients.ActiveDirectory) NuGet package and Azure AD Authentication Library (ADAL) have been deprecated. No new features have been added since June 30, 2020.   We strongly encourage you to upgrade, see the [migration guide](/azure/active-directory/develop/msal-migration) for more details.
+
 From within Visual Studio 2015, click **File**, **New**, **Project...** to open the new project dialog.  Expand **Visual C#**, then select **Windows** in the pane on the left.  Click **Console Application** in the center pane.  Name your project, then click **OK**.
 
 ![New Project](./media/cdn-app-dev-net/cdn-new-project.png)