Upgrade NT4 PDC to 2003 DC but Keep NT4 BDC running...

Discussion in 'Windows Server' started by akawood, Oct 27, 2005.

  1. akawood

    akawood Guest

    We are planning to upgrade NT4 PDC to 2003 DC. However the main application
    (not certified for 2K and 2003) is running on a NT4 BDC that we can not
    cannot get rid of it. Is it possible to keep the NT4 BDC running with the
    upgraded 2003 DC within the same domain? Any suggestion? Thanks
    akawood, Oct 27, 2005
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  2. Yes , it is possible. In this situation the AD works in "Windows 2000 mixed"
    mode (some functionality are not available, as Universal Groups for example).
    You can raise domain functional level to "Windows Server 2003 Interim" if you
    are sure that you will not have Windows 2000 DC. This domain functional level
    works only with Windows NT and Windows Server 2003 DC. The first Windows
    Server 2003 DC installed get the role of "Primary Domain Controller Emulator"
    and works as PDC to replicate domain informations to the BDC NT.
    Giorgio Igor Giuliano, Oct 27, 2005
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  3. akawood

    akawood Guest

    Thanks for the info.
    Microsoft has suggested to fully backup before doing so. What kind of the
    risk that we may be facing?
    akawood, Oct 28, 2005
  4. Every time you make deep modifications on systems or install products or
    upgrade something you have to make a full backup before doing it.
    In this case you are upgrading an operating system and converting the domain
    structure. The risks are unpredictable , they depend by the situation. For
    example in case of power down during the upgrade process may be the server
    will not able to boot.
    Before upgrade don't forget to take a look to the Event Viewer and resolve
    all the red error that may be present.
    Giorgio Igor Giuliano, Oct 28, 2005
  5. akawood

    akawood Guest

    Thanks. I understood that.
    To be more specific on NT4 BDC of our senario, what kind of the situation
    would be a concern for it? I meant do you hear anything as a known issue by
    running the upgraded domain in "Windows Server 2003 Interim" level?
    akawood, Oct 28, 2005
  6. No, it is the recommended mode for domains with NT4 and W2K3 domain
    Giorgio Igor Giuliano, Oct 28, 2005
  7. akawood

    akawood Guest

    Thanks for the info.

    akawood, Oct 29, 2005
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