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Friday, February 1, 2013

DCPROMO error

When demoting a DC I ran into this error:

The operation failed because: Active Directory Domain Services could not configure the computer account <hostname>$ to the remote Active Directory Domain Controller account <fully qualified name of helper DC>. “Access is denied”

I found a possible explanation dealing with missing security rights as described here kb2002413, but it was quickly clear that this was not the case.

It turned out to be a very simple solution, the computer had the protect object from accidental deletion checked, when this was unchecked, I was able to remove the DC.

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