The local Admin will be the only account available when the machine comes back up without AD.
1. Change (note – values are case sensitive)
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ProductOptions]
“ProductType”=”LanmanNT” to
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ProductOptions]
“ProductType”=”ServerNT”
2. Reboot
3. Delete the NTDS folder.
Remove references to the deleted server in any surviving replicas by using
NTDSUTIL metadata cleanup on a DC.