What special arrangements need to be made when migrating an Exchange 5.5 Organization into a mixed-mode Exchange 5.5 / Exchange 2003 Organization?
How do I migrate an Exchange 5.5 Organization into a mixed mode Exchange 5.5 / Exchange 2003 organization?
Exchange Migrator 2.3
The recommended practice for migrating an Exchange 5.5 Organization to a mixed-mode Exchange 5.5 / Exchange 2003 Organization is:
- For the mixed-mode Organization, migrate / move the remaining Exchange 5.5 mailboxes over to Exchange 2003
- Remove all remaining Exchange 5.5 servers and make all the necessary changes to promote the Exchange Organization to Native mode Exchange 2003
- Migrate the stand alone Exchange 5.5 Organization into the Exchange 2003 organization following the best practices for an Inter-Organization migration
For more information on best practices for using Exchange Migrator, see:
NETIQKB2197: What are the best practices for using Exchange Migrator?