Article ID: 2447990 - View products that this article applies to.
Consider the following scenario:
This issue occurs because an access violation exception occurs that is caused by a parameter that does not initialize successfully.
To resolve this problem, install the following update rollup:
(http://support.microsoft.com/kb/2291453/ )Description of the cumulative update package for Communicator 2007 R2: November 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.