Modify the ProductType entry in the registry. To do this, follow these steps:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ProductOptions ProductType.
Type ServerNT for Member Server
Type LanmanNT for Domain Controller
Note If this value is not set correctly or is misspelled, you may receive the following error message:
System Process – License Violation: The system has detected tampering with your registered product type. This is a violation of your software license. Tampering with product type is not permitted.