Move Mailboxes from Exchange 2010 Servers to Exchange 2003 Servers
Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2
Moving mailboxes from Microsoft Exchange Server 2010 to Exchange Server 2003? Consider the following:
The move process is performed offline, and end-users won't be able to access their mailboxes during the move.
Perform the move from the server running Exchange 2010 by using the move request cmdlets in the Exchange Management Shell. You can't use Exchange System Manager on an Exchange 2003 server to move the mailboxes.
If you're moving a mailbox that has a personal archive associated with it, you must disable the archive before moving the mailbox. For details, see Disable a Personal (On-Premises) or Cloud-Based Archive for a Mailbox.
If you’re moving a mailbox to Exchange 2003, you must disable single-item recovery and purge the Recoverable Items folder. For details, see Clean Up the Recoverable Items Folder.
For detailed instructions about how to move mailboxes, see Managing Move Requests.
To learn more about moving mailboxes, see Understanding Move Requests.
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