Wrong rename hostname domain controller

Question

Hello i'm Leonardo, i have big problem Whit 1 domain controller, i wrong rename hostname It, and i lose access to all user, the local administration is block, i was try recovery or change hostname, i was success access to cmd from blocked login ( untilman.exe solution for recovery credential ) . any idea?

Thanks for support

Answer 1

Simplest solution may be to remove from network, seize roles (if necessary)
https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/transfer-or-seize-fsmo-roles-in-ad-ds

do cleanup to remove remnants
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

and stand up a new one for replacement.

The two prerequisites to introducing the first 2019 or 2022 domain controller are that domain functional level needs to be 2008 or higher and older sysvol FRS replication needs to have been migrated to DFSR
https://techcommunity.microsoft.com/t5/Storage-at-Microsoft/Streamlined-Migration-of-FRS-to-DFSR-SYSVOL/ba-p/425405

I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting any operations. Then stand up the new one, patch it fully, license it, join existing domain, add active directory domain services, promote it also making it a GC (recommended), transfer FSMO roles over (optional), transfer pdc emulator role (optional), use dcdiag / repadmin tools to again verify health.

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Answer 2

Hi @Leonardo Santorso

The issue you are having is related to the solutions on this post:

https://social.technet.microsoft.com/Forums/en-US/09f6599e-8ec3-4f4d-ba4e-ecaa55578080/renamed-dc-ad-broken?forum=winserverDS

Basically using the NETDOM comand to rename Domain Controllers, instead of machine name changes or so, because NETDOM will change the SPN and DNS registration:

https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc782761(v=ws.10)?redirectedfrom=MSDN

Hope this helps with your query,

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