Article ID: 2623821 - View products that this article applies to.
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2514982 / )Description of the cumulative update for Lync 2010: November 2011
For more information about the similar issue with Office Communicator R2, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/983215/ )A blank window opens unexpectedly when you start Office Communicator 2007 R2