Unable to demote Domain Controller

Mohammed Anees 1 Reputation point
2021-05-08T14:10:27.99+00:00

Hi Team,

I am trying to demote a Domain Controller running on OS Windows Server 2012 R2 but getting error.
Screen shot attached.
Please advise on how to fix the issue.

Thanks,

94926-demotionerror.jpg

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Dave Patrick 426.1K Reputation points MVP
    2021-05-08T14:25:49.533+00:00

    I'd check the health of other domain controllers and role holders as first step.
    netdom query fsmo
    also dcdiag, repadmin tools may be helpful. If all checks out then the other option is to remove from network then seize roles (if necessary)
    https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/transfer-or-seize-fsmo-roles-in-ad-ds

    then do metadata clean up.
    https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/ad-ds-metadata-cleanup
    https://techcommunity.microsoft.com/t5/itops-talk-blog/step-by-step-manually-removing-a-domain-controller-server/ba-p/280564

    If you needed further assistance then please run;

    Dcdiag /v /c /d /e /s:%computername% >c:\dcdiag.log
    repadmin /showrepl >C:\repl.txt
    ipconfig /all > C:\dc1.txt
    ipconfig /all > C:\dc2.txt

    then put unzipped text files up on OneDrive and share a link.

    --please don't forget to Accept as answer if the reply is helpful--

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  2. Dave Patrick 426.1K Reputation points MVP
    2021-05-09T13:09:04.123+00:00

    Any progress or updates?

    --please don't forget to Accept as answer if the reply is helpful--

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  3. Fan Fan 15,276 Reputation points Microsoft Vendor
    2021-05-10T01:40:25.213+00:00

    Hi,

    Based on the error screenshot you shared above, it seems you want to demote the DC with the FSMO roles, right?
    Also, it seems it can't find another DC to transfer the roles.
    Before the demotion, we need to check the status of all the DCs in your domain, you can run the command provided by Dspatric to confirm the situation.

    If there is a good DC, you can try size the roles from the one you want to demote, and then done a metadata cleanup.

    Best Regards,

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  4. Dave Patrick 426.1K Reputation points MVP
    2021-05-12T12:34:01.86+00:00

    Any progress or updates?

    --please don't forget to Accept as answer if the reply is helpful--

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