Dcdiag fails for NCSecDesc test on Windows 2008 Domain Controllers

Source: Microsoft Support

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When you run DCDIAG on a Windows Server 2008 Domain Controller the process might fail the Naming Context Security Descriptors Test (NcSecDesc), and you may see a message similar to the following:

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Starting test: NCSecDesc

������� Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have

���������� Replicating Directory Changes In Filtered Set

������� access rights for the naming context:

������� DC=DomainDnsZones,DC=CONTOSO,DC=COM

������� Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have

���������� Replicating Directory Changes In Filtered Set

������� access rights for the naming context:

������� DC=ForestDnsZones,DC=CONTOSO,DC=COM

������� ......................... Contoso-DC1 failed test NCSecDesc

If you have not run adprep/rodcprep, Dcdiag.exe will return 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.

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For more information, see the document �Known Issues for Installing and Removing AD DS� at the following Microsoft Web site: http://technet.microsoft.com/en-us/library/cc754463.aspx

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