Article ID: 973337 - Last Review: July 31, 2009 - Revision: 1.0

A peer-to-peer file transfer fails between two Microsoft Office Communications Server 2007 R2 Group Chat clients

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This article applies to the following product:
  • Microsoft Office Communications Server 2007 R2 Group Chat client
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SYMPTOMS

When a peer-to-peer file transfer is performed between two Microsoft Office Communications Server 2007 R2 Group Chat clients and one or both clients are behind a firewall, the transfer fails.
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CAUSE

This problem occurs because the Group Chat client that is behind a firewall provides an incorrect IP address to the other client. Therefore, the other client times out when it tries to make the connection.
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RESOLUTION

To resolve this problem, apply the following update:
969818  (http://support.microsoft.com/kb/969818/ ) Description of the update for Microsoft Office Communications Server 2007 R2, Group Chat Client: July 2009
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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Keywords: 
kbqfe kbexpertiseinter kbsurveynew kbprb KB973337
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