Tuesday, February 5, 2008

Couple of Common Schema Related issue with Active Directory and their solution.

Unable to modify or extend the schema.

Cause: The schema operations master is not available. The domain controller that currently holds the schema master role is offline or network connectivity between you and the schema master is inoperable.

Solution: Restore the availability of the schema master by fixing the network connectivity problem or by transferring or seizing the schema master role.


Unable to add attributes to a class.

Cause: The attributes cannot be associated with a class because the schema cache has not been updated.

Solution: Ensure that the schema cache is updated after an attribute is added before attempting to add the attribute to a class.

Unable to connect to a domain controller running Windows 2000 from the Active Directory Schema snap-in.

Cause: You are trying to connect to a domain controller running Windows 2000 that does not have Service Pack 3 or later installed.

Solution: Upgrade domain controllers running Windows 2000 to Service Pack 3 or later.

Trust Relationship Between Workstation and Domain Fails


Log on locally as a local administrator. In the Network tool of Control Panel, select Change and enter a Workgroup name, leaving the domain. Restart the computer and log on locally as a local administrator.

There are two methods to rejoin the domain:
You can join the domain from the client if at the same time you can provide an administrator username and password on the domain.

You can delete the existing computer account in Server Manager, recreate the computer account, synchronize the domain, and then on the client rejoin the domain.