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Issues that this hotfix package fixes
This update package fixes the following issues:-
972951 (http://support.microsoft.com/kb/972951/ ) A compliance server reports incomplete or inaccurate information about user JOIN and PART events in Microsoft Office Communications Server 2007 R2 Group Chat Server
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972944 (http://support.microsoft.com/kb/972944/ ) You may experience performance issues in a channel server in Communications Server 2007 R2 Group Chat Channel Server
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973384 (http://support.microsoft.com/kb/973384/ ) The Group Chat service does not work after you restart a computer that is running Office Communications Server 2007 R2 Group Chat Server
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973385 (http://support.microsoft.com/kb/973385/ ) Users in a secured organizational unit (OU) named "Blocking Inheritance" cannot use the Group Chat Admin Tool
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973386 (http://support.microsoft.com/kb/973386/ ) A compliance XML output file is not generated by a compliance server in Microsoft Office Communications Server 2007 R2 Group Chat Server