Need Help in Raising Domain From Mixed to Windows 2003

Posted on 2009-04-30
Last Modified: 2012-05-06
Here is my scenario:
My Network is comprised of 2 domains, WindowsNT4 and Windows 2003. We have been migrating everything off the old domain to the new one. There are no users authenticating to it and the only machine left is a print server which happens to be a domain controller. All other computer have been migrated to the Windows 2003 active directory. I am running in mixed mode and want to raise the domain. The problem is that I cannot get rid of the old NT machine right now. There is a printer on there that is mission critical. It is an old one and does not operate well on the updated 2000/2003 printer driver.
I thought I could just make this old machine a member of the newer 2003 domain but since this is the last machine in the old domain, I cannot seem to demote it to a member server.
Can I go ahead and upgrade the 2003 domain from mixed to native since I do not have any users authenticating the NT machine. I presently have a trust between the domains. If I can do that can you point me in the right direction of how to do it. I have already migrated the old Exchange 5.5 and our Exchange 2003 is running in native mode right now.
Any Help Will Be Useful !
Question by:SKENT9735
    LVL 82

    Accepted Solution

    You can raise the forest and domain level to W2k3 Functional Level without it influencing the trust. The domain level only is only important for down-level *DCs* in the same domain, you can have a trust between a W2k3 in full functional level and an NT4 domain.
    Another option might be to use the third-part tool "UPromote" to demote your current NT4 DC (a "native" demotion is not possible in NT4) to a member server, and then join it to the AD domain. Make sure you have a working backup of that machine before you demote it, beause permissions will have to be changed.
    UPromote: Promote your NT Server to a Domain Controller

    Author Comment

    Great idea .. I will look at UPromote first ..
    I figured I would be OK in promoting to W23 functional since no one is authtenticating on the old server, but I just wanted to get the opinion of an expert since I have never done this before ... My goal would to get rid of the old domain if I could ... but I do want to have the functions of a native 2003 domain

    Author Comment

    It wasn't in my budget to pay $130. to demote the old NT Server, so I just raised the domain and things didn't crash and go boom .. so all is good ... Thanks

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