White Paper: Fundamentals of Troubleshooting Unified Messaging in Exchange 2007
A new white paper about troubleshooting UM in Exchange Server 2007 was released and blogged in the MSExchangeTeam blog.
Here is the white paper: http://go.microsoft.com/fwlink/?LinkId=153717
Read more at source: http://msexchangeteam.com/archive/2009/06/03/451539.aspx