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You use the Virtualized Domain Controller (VDC) cloning feature that Windows Server 2012 introduced. After you clone a new domain controller, you find that the server starts in Directory Services Repair Mode (DSRM). If you examine the c:\windows\debug\dcpromo.log, you find the following error entry:
This error code translates to 0x21a2, which is as follows:
The FSMO role ownership could not be verified because its directory partition has not replicated successfully with at least one replication partner
VDC cloning requires a Windows Server 2012 primary domain controller emulator (PDCe). In this case, the PDCe is discoverable by using the domain controller locator (Locator, also known as "DCLocator") and Domain Name System (DNS), and the PDCe is running the correct operating system. However, the PDCe was recently transferred from another server. And, the PDCe has not yet performed incoming (also known as "inbound") replication of the domain partition to learn about the current state of PDCe FSMO ownership before the PDCe can reassert ownership of this role (INITSYNC).
This behavior is by design. DSRM is intentionally invoked as part of the cloning process in order to safeguard the network and the domain from duplicated domain controllers.
Directory Services Repair Mode was called Directory Services Restore Mode in previous Windows operating systems.
For more information about how to configure and troubleshoot VDC together with details and step-by-step guidance, go to the following Microsoft websites:
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