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The User-Agent header in the SIP request that is sent by Office Communications Server 2007 R2 Group Chat Admin Tool is not unique and clear enough
Article ID: 2277605 - View products that this article applies to.
The User-Agent header in the Session Initiation Protocol (SIP) request that is sent by Microsoft Office Communications Server (OCS) 2007 R2 Group Chat Admin Tool is not unique and clear enough. This makes it difficult to differentiate this header from the header in the SIP request that is sent by the OCS 2007 R2 Group Chat Client console.
To fix this problem, install the following cumulative update:
(http://support.microsoft.com/kb/2032922 / )Description of the update for Office Communications Server 2007 R2 Group Chat Client: July 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.