Article ID: 2489816 - View products that this article applies to.
You add a Microsoft Office Communicator user (user A) to your Office Communicator 2007 R2 contact list. You log off Office Communicator 2007 R2, and then you log back on to Office Communicator 2007 R2. However, Office Communicator 2007 R2 displays the name of user A as another Office Communicator user (user B). Additionally, the following issue occurs:
This issue occurs because Office Communicator 2007 R2 does not identify user A and user B correctly if the two users have the same hash-key of their Uniform Resource Identifier (URI) in the global address list (GAL).
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2501722/ )Description of the cumulative update package for Communicator 2007 R2: March, 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.