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TheWaterbug's avatar
TheWaterbug
Copper Contributor
Jul 12, 2023
Solved

DCPromo to remove AD DS fails with "Logon Failure: The target account name is incorrect."

Good thing this is just my test network! I have a VM clone of my ancient WS 2008 R2 ("OldDC") running AD DS in a test network along with two spiffy new instances of WS 2022 (NewDC1 and NewDC2), both ...
  • TheWaterbug's avatar
    TheWaterbug
    Jul 13, 2023
    Thanks for the reminder. After trying a bunch of different things, I ended up trying an in-place upgrade to Server 2012 R2. After the upgrade finished, not only were the credentials fixed for OldDC, they also were fixed for OldDC2.

    I did not try running dcpromo, because I am thinking that I may no longer want to demote them if I can upgrade them (testing applications as we speak!), but I was able to browse from both OldDC and OldDC2 to shares on NewDC1 and to NewDC2, whereas previously I could not, and previously browsing to those shares generated the same error that popped up when attempting to finish dcpromo, so I am guessing they had the same root cause.

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