Microsoft's only supported method of migrating mailboxes directly from Exchange Server 5.5 servers to Exchange Server 2003 servers in an intraorganizational migration is to use the Move Mailbox Wizard. To migrate mailboxes from Exchange 2000 Server servers to Exchange 2003 servers, Microsoft also recommends using the Move Mailbox Wizard, although in-place upgrades are fully supported.
The Move Mailbox Wizard has been around since Exchange 2000, but the Exchange 2003 version is a much more attractive and efficient tool for moving mailboxes from legacy Exchange servers to Exchange 2003. Let's discuss the wizard's use and new features.
When to Use the Wizard
You can use the Move Mailbox Wizard only for intraorganizational migrations, not for interorganizational migrations. In other words, you can use the wizard to move mailboxes only between servers that are within the same Exchange organization. For interorganizational moves, you need to use the Mailbox Merge Wizard (formerly Exmerge) or the Exchange Migration Wizard. . . .
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