Article ID: 972773 - View products that this article applies to.
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A call to an audio or video conference fails in a Microsoft Office Communications Server 2007 R2-based application. However, the diagnostics information for the conference call is unavailable in the log for the Office Communications Server 2007 R2-based application.
To resolve this issue, apply the following update:
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
971793Note After you apply this update, the diagnostics information for the conference call is available in the log for the Office Communications Server 2007 R2-based application. This diagnostics information contains information about the cause of the problem.
(https://support.microsoft.com/kb/971793/ )Description of the update package for Office Communications Server 2007 R2, Audio/Video Conferencing Server: July 2009
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 972773 - Last Review: January 15, 2015 - Revision: 2.0