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FIX: You receive the generic "Authentication Failed" error message and are not prompted to change your expired password when you try to log on to a Forefront Unified Access Gateway 2010 portal
Article ID: 2743268 - View products that this article applies to.
Consider the following scenario:
In this scenario, your log on may be unsuccessful, and you receive the generic "Authentication Failed" error message. Additionally, you are not prompted to change your password.
This issue may occur if the user account is located in a different domain from where the Unified Access Gateway computer account is located, and there is no full trust relationship between the domains.
To resolve this problem, install the service pack that is described in the following Microsoft Knowledge Base article:
(http://support.microsoft.com/kb/2710791/ )Description of Service Pack 2 for Forefront Unified Access Gateway 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates