nt4.0/exchange 5.5 to 2003 os/exchange migration

Discussion in 'Server Migration' started by MAJ, Aug 3, 2004.

  1. MAJ

    MAJ Guest


    I have 3 nt 4.0 domains with one exchange server for all domains (two way
    trusts in every direction). I have almost finished upgrading one domain to
    2003 (this domain has the exchange 5.5 server in it). I have been reading
    what I can find on this process and I believe my steps should be as follows
    (exchange 5.5 server resides on a member server).

    Upgrade existing domain to 2003.
    Switch to native mode.
    Migrate users in two other domains to my native mode domain.
    Use the Move mailbox wizard to move my mailboxes to the new exchange 2003

    My main question is....

    Once in native mode will the users in my two nt 4.0 domains be able to
    access the exchange 5.5 server....Will the 2k3 domain users be able to
    access the exchange 5.5 server.

    Will the trusts still be intact once in native mode or will they need to be

    MAJ, Aug 3, 2004
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  2. Hi MAJ,

    Thanks for your posting here.

    I think the plan is OK. The trusts will not be affected during upgrade. The
    users in new upgraded Windows 2003 domain and the users in other two NT 4.0
    domains still can access the Exchange 5.5 server. But if you want the
    relevant migrated users to use the mailbox in Exchange 5.5, you may need to
    re-associate the mailbox with the new user accounts.

    If you have any more concern about Exchange issue, I would like to suggest
    that you submit a new post in our Exchange news groups:


    The above newsgroups are dedicated for discussing Exchange issues and I
    believe that you will get more specific and detailed suggestions there.

    Have a nice day!

    Bob Qin
    Microsoft Online Partner Support

    Get Secure! - www.microsoft.com/security

    When responding to posts, please "Reply to Group" via your newsreader so
    that others may learn and benefit from your issue.
    This posting is provided "AS IS" with no warranties, and confers no rights.
    Bob Qin [MSFT], Aug 4, 2004
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  3. No there is a problem here.

    An ADC connection will need to be setup between the Exchange 55 org and the
    AD before principals in the new AD domain will be able to access their

    Brian Desmond
    Windows Server MVP

    Brian Desmond [MVP], Aug 9, 2004
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