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Merging identical mailboxes from exchange 2003 to 2010 RRS feed

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    I'm doing a test run of a server 2003 migration to exchange 2010. So far
    everything is going ok and following the most recommended guides. One
    question I have is doing this test run I'm moving the 2003 mailboxes to
    exchange 2010. This is a very long process as some of these mailboxes
    are over 4GB, in one case 20GB. My question is, if I take this new
    server that is joined to the same domain as the cloned 2003 server and
    plug it in to our production network with the main server, could I move
    the mailboxes again to have all the updated mail? The database I'm
    moving now is a snapshot from over a month ago so I'm wondering if
    exchange can merge mailboxes that are actually identical but reside on
    different server. I essentially have a copy User1's account from months
    ago on 2010 now and User1's currently in use account on 2003. Will this
    work to move again, and will it just overwrite the whole box or merge
    the content and save time? I'm trying to minimize downtime so any advice
    on how to do this most efficiently would be appreciated.
    Thursday, July 10, 2014 2:50 PM
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    I do not see any way that you could do this without costing yourself a WHOLE lot more time and hassle.

    You are just going to bite the bullet and move the "live" mailboxes over.  Surely the users can do without their email for a few hours.

    Jim McBee - MVP, MCT, MCSE Using Exchange since the v4.0 beta in 1995 - Blog http://mostlyexchange.blogspot.com

    • Marked as answer by jindraaa Friday, September 12, 2014 2:04 PM
    Thursday, July 10, 2014 7:33 PM
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