Here is a collection of the top Microsoft Support solutions for the most common issues experienced when using Microsoft Lync 2013 (updated quarterly).

Support for Office 2003 products ended on April 8, 2014.

1. Solutions related to Sign on and authentication - Internal user:

2. Solutions related to Sign on and authentication - External user:

3. Solutions related to Group Chat:

4. Solutions related to Service startup:

5. Solutions related to Installation and uninstallation issues (using Msiexec, updates, Office Communicator Automatic Updates, and pilot cleanup):