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Consider the following scenario:
You publish a Simple Mail Transfer Protocol (SMTP) server by using Microsoft Forefront Threat Management Gateway (TMG) 2010.
An SMTP session between an external server and the SMTP server is active for more than 15 minutes.
You try to create a report by using the Forefront TMG Management console.
In this scenario, you cannot create the report.
This issue occurs because Forefront TMG logs incorrect values for the bytesSent attribute and the bytesRecv attribute after 15 minutes. This behavior occurs when Forefront TMG logs periodic records for a long active session. This behavior causes TMG to be unable to create reports after a long active session.
Note After any server publishing rule publishes a SMTP server, and after a session to the server is active more than 15 minutes, this issue occurs.
Service pack information
This problem is fixed in Forefront TMG 2010 Service Pack 1.
For more information about how to obtain Forefront TMG 2010 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
981324 List of problems that are fixed in Forefront Threat Management Gateway 2010 Service Pack 1
Hotfix rollup information
To resolve this issue, install the hotfix rollup package that is described in the following Microsoft Knowledge Base (KB) article:
980311 Description of the Forefront TMG 2010 hotfix package: February 12, 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Forefront TMG 2010 Service Pack 1.
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