This is a great tool for helpdesk agents to resolve common problems in lync.

This resource is for first-level help desk agents who support Microsoft Lync Server 2010 clients. Note: The .zip file contains both the print documentation and the Help file.

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=4222e61c-c199-47e0-b649-495b12d0b5e7