A. If the demotion failed when you removed AD from a Windows 2000 domain controller (DC) to convert the DC to a member server, try the following approach:
- Use regedt32 to navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ProductOptions.
- Change the ProductType's data value from LanmanNT to ServerNT. (Use the exact case.)
- Shut down and restart the server.
- Delete the NTDS folder.
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