Article ID: 2464845 - View products that this article applies to.
Consider the following scenario:
This issue occurs because of a bug in an internal method of the Lync 2010 Client API. This method checks the trust level of a given URL incorrectly and ignores a URL address that does not contain a page name.
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.