Article ID: 981446 - View products that this article applies to.
Microsoft Office Communications Server 2007 R2 Group Chat Server cannot log some PART or JOIN events if an abnormal drop from the Group Chat Server occurs. For example, consider the following scenario:
This problem occurs because the PART timestamp is not accurately tracked when an abnormal drop from Group Chat Server occurs.
To fix this problem, install the following update:
(http://support.microsoft.com/kb/980042/ )Update package for Office Communications Server 2007 R2 Group Chat Server: April 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.