NT4 to 2003 upgrade - client setup

Discussion in 'Server Migration' started by drzaius2000, Feb 16, 2010.

  1. drzaius2000

    drzaius2000 Guest

    I am performing an upgrade from NT4 to 2003 and have done a bit of testing
    but I am still unsure of the behavior of workstations and servers when they
    suddenly find themselves on an upgraded domain.

    Currently, the plan is this:

    1. Take a NT4 BDC on a virtual machine and upgrade it to 2003. Add
    NT4Emulator key.
    2. Configure DNS, etc. Verify everything transferred over. Remove
    NT4Emulator key.
    3. Reboot.
    4. Configure clients to use new DNS server.
    5. Shutdown all other NT4 BDCs.

    Im uncertain at what happens between steps 3 and 4. Will the workstations
    continue to be able to authenticate on the domain before I change their DNS?
    On my test machine, it looks like hung up, so I was forced to reboot it
    before it accepted being a member of the AD domain. I could see its domain
    name changed from "domain" to the FQDN I chose "domain.local".

    Are reboots required? Will there be interruption of service?

    drzaius2000, Feb 16, 2010
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  2. Hello drzaius2000,

    1. You must use the PDC not a BDC to upgrade to Windows server 2003. If you
    don't have that amount of servers, the NT4Emulator regkey is not a must (http://support.microsoft.com/kb/298713)

    2. DNS is the most important part for Active directyory, make sure to use
    only domain DNS servers on the NIC. After the upgrade process is completed
    check the new DC with the support tools dcdiag /v, netdiag for errors. Therefore
    install the support\tools\suptools.msi form the 2003 installation disk on
    the 2003 DC.

    3. So during AD implementation you choose a different domain name as before,
    from single label domain name DOMAIN to DOMAIN.LOCAL? BTW, if you have MAC
    OS in use you run into conflict with .LOCAL top level domain name, so better
    choose something like .LOC for the internal domain name.

    Of course a reboot is needed for the servers during upgrade. For the clients
    you have to make sure they use the new domain DNS server on the NIC only,
    so you can be sure they only work with that one and as you are changing the
    domain name they also have to get the correct one.

    Here you find all detailed steps:

    Best regards

    Meinolf Weber
    Meinolf Weber [MVP-DS], Feb 17, 2010
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