I demoted my win 2k DC to a member and now I can not get it to rejoin the domain?

Posted on 2004-11-19
Last Modified: 2010-04-14
After demoting my one and only win 2k DC to a member I ran dcpromo on a new 2k server.  I joined all of my 2k and xp clients to this new domain with no problem.  But when I try to join my old DC to this domain I get an error.  I checked the event log and I am getting DNS errors.  DNS was running on the old DC and I removed it after I demoted it.  DNS is now config on the new DC.  All ips are static and and tcp/ip config points to the new server.  I confirmed this by running ipconfig on the old
DC.  Ping works from old DC to new.  Two questions,  How can I fix this and how should I have done it in the first place?  Thanks.

Question by:DaleFrazier
    LVL 11

    Accepted Solution

    I would first check two things:

    Is the member server pointing to the new DC as it's DNS server?  I assume that the MS was the only DNS server and was pointed to itself.

    You may have to make the MS a member of a workgroup, then join it to the new domain.

    LVL 12

    Expert Comment

    If you are going to install DNS on the old DC make sure that you point it to itself as the Primary DNS.  On your new DC  that has DNS, it should also point to itself for the Primary DNS. So for example, say your new DC's IP is, then in your TCP/IP config, your Primary DNS IP should be  If you are not planning to install DNS on the old DC that you are trying to promote, make sure that it's Primary DNS is set to the IP of the new DC.  It should work flawlessly.  Are you using AD Integrated zones on your DNS server?  What specific errors are you getting in the Event logs?
    LVL 11

    Expert Comment

    Thanks Dale,

    Glad I could assist.  Thanks for using EE!

    Featured Post

    How to run any project with ease

    Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
    - Combine task lists, docs, spreadsheets, and chat in one
    - View and edit from mobile/offline
    - Cut down on emails

    Join & Write a Comment

    NTFS file system has been developed by Microsoft that is widely used by Windows NT operating system and its advanced versions. It is the mostly used over FAT file system as it provides superior features like reliability, security, storage, efficienc…
    Read about the 3 stages of the buyer's journey: awareness, consideration, and decision.
    how to add IIS SMTP to handle application/Scanner relays into office 365.
    In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor ( If you're interested in additional methods for monitoring bandwidt…

    754 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    21 Experts available now in Live!

    Get 1:1 Help Now