title: Azure app service using Azure AD from a different subscription
body: <p>We have a .NET Core application with a React app in it, and we've developed it using our Azure AD for login.  Now when I try to change the settings to point to a different Azure AD account, it runs locally, but blows up in Azure.  I found the application literally breaks with weird errors unless I change the GUIDs and other values back to use the internal Azure AD.</p>
  
  <p>Is this a known restriction? Can I host an app for a client in my Azure and use their AD?</p>