Article ID: 2844270 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the Lync for Mac 2011 client does not accept an INVITE request that indicates that the sharing session requires an encrypted connection.
To resolve the issue, install the following cumulative update:
(http://support.microsoft.com/kb/2844274/ )Description of the Microsoft Lync for Mac 2011 14.0.5 update
For more information about similar issues, click the following article numbers to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2793013/ )A user can’t start an encrypted desktop sharing or application sharing session with a Lync for Mac 2011 user
(http://support.microsoft.com/kb/2837048/ )Desktop sharing or video sharing session disconnects when you use Lync for Mac 2011