If you added a DC and accidentally (or simply forgot) to change the name of the computer. Here is how to do it correctly, run these commands using PowerShell: netdom computername CURRENTNAME.mydomain.local /add:NEWNAME.mydomain.local netdom computername CURRENTNAME.mydomain.local /makeprimary:NEWNAME.mydomain.local Then after reboot: netdom computername server.ckmay.local /remove:CURRENTNAME.mydomain.local
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