Exchange 2003 --> 2007 Migration Process

Posted on 2009-12-22
Last Modified: 2012-05-08
Looking for assistance, best pratices, great knowledge articles, do's/don't.. etc to make this Migration sucessful
Question by:charlestasse
    LVL 74

    Expert Comment

    by:Glen Knight
    Can you explain a bit more about the current config?
    Single server? Orultiple DC's exchange servers?
    LVL 14

    Author Comment

    Single Server, Exchange is not running on a DC, Multiple DC's in the enviorment
    LVL 74

    Accepted Solution

    The technetium article pretty much covers it:

    there aren't really any gotchas.  The one thing I would recommend if there will be a period where mailboxes could reside on both 2003 & 2007 is to first install a CAS (Client Access Role) as a temporary measure because the 2007 server will not proxy requests for 2003 if it has mailboxes on it.

    So for example install a 2007 CAS only role (this could be a virtual machine as it's only temporary) then install your live CAS, Mailbox, Hub Transport server.

    Reconfigure your OWA URL forwarding so it goes to the CAS only server.  This way both the 2003 and 2007 can use OWA during migration.
    LVL 7

    Assisted Solution


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