Article ID: 2483227 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the parameters are not filtered correctly when the INVITE message is constructed.
To resolve this issue, install the following cumulative update:
(http://support.microsoft.com/kb/2467763/ )Description of the cumulative update package for Lync 2010: January 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.