Hi JWinsor566,
Thank you for posting in the Microsoft Community Forums.
It seems there is old server that has been disconnected for more than the survival time of the logical deletion and cannot be rigorously replicated. You can delete the old server if it is no longer in use. If there is still a FSMO on the server in question, you need to transfer or seize the FSMO its, then de-domain it, then purge the data.
Transfer or seize Operation Master roles - Windows Server | Microsoft Learn
Step-By-Step: Manually Removing A Domain Controller Server [1e69-40cc-263-4759] (microsoft.com)
Clean up AD DS server metadata | Microsoft Learn
Best regards
Neuvi Jiang
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