Event ID 57006 - Cannot restart the Lync Server 2013 Front-End service

When installing CU updates for Lync Server 2013 make sure to update the backend database.  If you fail to do this crucial step you will more than likely receive this error.

http://support.microsoft.com/kb/2809243

Lync Server 2013 Standard Edition:
Install-CsDatabase -ConfiguredDatabases -SqlServerFqdn frontendserver.fqdn -Verbose

Lync Server 2013 Enterprise Edition
Install-CsDatabase -ConfiguredDatabases -SqlServerFqdn sqlserver.fqdn -Verbose

Microsoft Lync Connectivity Analyzer – Updated Version 8308.582

A new version of the Microsoft Lync Connectivity Analyzer is now available.
 
Updated Version 8308.582  (Jan 2014)

Originally released on Feb. 7, 2013

The tool helps Lync administrators determine whether the deployment and configuration of their on-premises Lync Server environment meets the requirements to support connections from Lync Windows Store app and Lync mobile apps.

 

http://www.microsoft.com/en-us/download/details.aspx?id=36535 (64 Bit)

http://www.microsoft.com/en-us/download/details.aspx?id=36536 (32 Bit)