When you run the User activity report in Microsoft Forefront Threat Management Gateway (TMG) 2010, the report header may include a list of servers and a message that resembles the following:
Servers with incomplete report data: server_name
(Check for relevant alerts) However, when you check the TMG Management console and the event log, there are no relevant alerts.
To resolve this problem, install the service pack that is described in the following Microsoft Knowledge Base article:
2555840 Description of Service Pack 2 for Microsoft Forefront Threat Management 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:
824684 Description of the standard terminology that is used to describe Microsoft software updates