Existing Configuration: WIndows 2003 Server, Exchange 2003, 80 mailboxes
New configuration : add a Exchange 2010 Server
Is it possible to add a new Exchange 2010 Server and to leave the Exchange 2003 working ? Both Exchange servers will be functional, some mailboxes will stay on the Exchange 2003 Server and some other mailboxes and all new mailboxes will be migrated or created in the Exchange 2010
Is it a realistic approach ? Is it a more complicated approach than a total and "all in one" migration from Exchange 2003 to Exchange 2010 or is it more easy and "smooth" ?
Thank you for you comments