Microsoft has released both the printed documentation and Help file on Troubleshooting Microsoft Lync Server 2010 Clients and it can be downloaded at the Microsoft Download Centre.
This resource provides first-level help desk agents who support Lync Server 2010 clients (Microsoft Lync 2010, Microsoft Lync 2010 Attendee, and Microsoft Lync Web App) with the following:
– A script for opening a service call and identifying the problem the user is having
– Information about how to resolve more than 200 common user problems
– Tools and resources for additional troubleshooting
Troubleshooting Microsoft Lync Server 2010 Clients (.zip)
Windows Info Portal 