Chapter 20. Integrating Exchange Server 2010 into an Existing Exchange Server 2003 Environment

This chapter provides information and commands concerning the following topics:

Configuring routing with Exchange Server 2003

Suppressing link state updates on Exchange 2003 bridgehead servers

During a migration from Exchange Server 2003 to Exchange Server 2010, messages must be able to be routed regardless of where the recipient’s mailbox currently exists. Exchange 2003 uses routing groups to route messages, whereas Exchange 2010 uses AD sites and site links. However, mailflow cannot be interrupted simply because a mailbox has been moved from 2003 to 2010. Also, mail must still be routed between a recipient’s mailbox on a 2003 server and a mailbox ...

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