When attempting to login to the web portal using Active Directory user account (single sign on) the login fails. The web portal logs show the following error :
System.Exception: Single-sign-on failed, URL was webpage.com ---> System.AggregateException: One or more errors occurred. ---> VI.Base.ViException: Failed to authenticate user. ---> VI.Base.ViException: The current user could not be determined.
Follow the steps below to disable Anonymous authentication and enable Windows Authentication
If Windows Authentication is not present in step 5 follow the steps below to add it.