- You configure Microsoft Forefront Unified Access Gateway 2010 to accept user principal name (UPN) logons.
- Domains from all forests are served by one repository.
- You try to log on to the Unified Access Gateway portal from a domain in a trusted forest by using the UPN format.
In this scenario, you receive an "Authentication failed" error message. However, if you specify your logon credentials by using the SAM account name format, you can successfully log on. Additionally, other users from a domain in the Unified Access Gateway forest can log on by using the UPN format.
Article ID: 2998752 - Last Review: 28 Oct 2014 - Revision: 1