The latest Lync Client and Server update (as of December 6, 2011) was released a couple of weeks ago and is called Cumulative Update (aka ‘CU4’). I finally had a chance to read about it and install it.
It can be downloaded here: http://www.microsoft.com/download/en/details.aspx?&id=11551. The associated knowledge base article is here: http://support.microsoft.com/kb/2493736
Note: this . . . → Read More: Lync Client and Server Cumulative Update Package (CU4)