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Lync Server 2010
Hotfix information
if you are not severely affected by this problem, we recommend that you wait for the next update that contains this hotfix.		 http://support.microsoft.com/kb/2658817

2670430

 4.0.7577.189
Lync Server McxStandalone

 

http://support.microsoft.com/kb/2670434

2665325

 4.0.7577.189
Lync 2010 http://support.microsoft.com/kb/2665270

2669896

 4.0.7577.4064