A client policy does not successfully block a URL that is sent by using Microsoft Lync for Mac 2011.
To resolve this issue, install the following update:
2963369 Update 2963369 for Lync for Mac 2011 14.0.9
If you set the client policy to block URLs for other Lync clients, you receive the following message when you send a URL:
The URL was not loaded in response to you clicking the link because this feature is restricted by policy. For more information contact your system administrator.