We are increasingly beginning to see customers calling us regarding the following error . I thought it would be best to blog it for benefit of others.
You have a minimum on one Windows 2008 Domain Controller deployed in a Windows 2003 Domain. When you run dcdiag on or against a Windows Server 2008 domain controller, the Naming Context Security Descriptors (NcSecDesc) test fails. The test passes for Windows Server 2003 domain controllers in the same domain.
Starting test: NCSecDesc
Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have
Replicating Directory Changes In Filtered Set
access rights for the naming context:
......................... DC2K8001 failed test NCSecDesc
If you have not run adprep /rodcprep, dcdiag.exe returns an error when it runs the NCSecDesc test. This test checks that the security descriptors on the naming context heads have appropriate permissions for replication. The error indicates that the Enterprise Domain Controllers group does not have Replicating Directory Changes In Filtered Set access rights for the DNS application directory partitions.
If you do not plan to add an RODC to the forest, you can disregard this error. If you plan to add an RODC to the forest, you must run adprep /rodcprep.
Known Issues for Installing and Removing AD DS