October 2012 Updates Released for Lync Server 2010
The update installer can be downloaded from here (Lync Server 2010) Please see below for installation details.
http://www.microsoft.com/en-us/download/details.aspx?id=11551
Lync 2010 Client update can be downloaded from here
http://support.microsoft.com/kb/2737155
Lync 2010 Attendee – Administrator level installation can be download from here
http://support.microsoft.com/kb/2752160
Lync 2010 Attendee – User level installation can be download from here
http://support.microsoft.com/kb/2752157
Description of the updates and the KB articles can be found here
http://support.microsoft.com/?kbid=2493736
Also note when updating your Lync environment as most updates require updating your CsDatabase as described at the bottom of this support page http://support.microsoft.com/?kbid=2493736