SymptomsEnd users click the Log Off button in the Forefront UAG portal and are logged out of the portal, but an event 152 appears in the event viewer or in the Web Monitor with the description "WS-FAM: User with lead user claim value [user_name] could not be signed out. Session ID [session_ID], Trunk name: [trunk_name]."

CauseAn unknown error occurred when the user attempted to sign out.

SolutionYou should perform an IIS reset to make sure that users are completely signed out from the portal. If you continue to see a large number of occurrences of this error in the event viewer, you should collect traces from the InternalSite and troubleshoot any problems that occur in InternalSite. For information about collecting traces, download the Forefront UAG Tracing Symbols (http://www.microsoft.com/downloads/en/details.aspx?FamilyID=fc052e67-2a04-4058-b326-9d92aa67b2c4) and follow the instructions in the guide.