Linking Exchange 2003 to Exchange 2010

During a migration project, you will have to decide how to connect Exchange 2010 servers to the existing routing infrastructure. The detail of how to connect Exchange 2003 to Exchange 2010 is well documented in TechNet and other books and hasn’t changed significantly from the situation for Exchange 2007. In brief, the hidden routing group into which Exchange 2010 servers are installed is exposed to Exchange 2003 servers through a routing group connector that links the SMTP-based messaging topology used by Exchange 2010 and Exchange 2007 and the X.400 message transfer agent (MTA)-based approach taken by earlier versions.

The simplest and best approach is to locate the connector in a hub Exchange 2003 routing ...

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