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Primary group cannot be removed when upgrade DC

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Primary group cannot be removed when upgrade DC

Postby guest » Wed Aug 06, 2008 9:01 pm

Q: We have two Domain Controllers running windows 2008. One of DCs is read-only DC and we would like to upgrade it to DC. When I try to remove read-only DC, I received this message: "The primary group cannot be removed. Set another group as primary if you want to remove this one". If I try to add Domain Controllers and change it to primary group, I receive this message "The following Active Directory Domain service error occurred: Cannot change the primary group ID of a domain controller account".

How do you upgrade read-only DC to DC?

A: to promote a RODC to RWDC, you should first demote the RODC
and then promote it to RWDC. You should use the Administrator credential to
perform this. Please do not use delegated account credentials.

1. To do demote a DC, open a command prompt, type dcpromo and select Remove
Active Directory

2. If the error message appears again, please follow the steps below:
create a new group by selecting the Users container in the Active Users and
Computers snap-in for your domain, and make sure the following settings are
Group scope: Global
Group type: Security
Note: if the group scope is set to 'Domain local' the group cannot be
configured as the primary group.

3. If you have tried the above with no success, you can force demote the
RODC. This will demote the DC by force.
To do so, follow the steps below:
a) Identify the replication partner
b) Open a command prompt, type dcpromo /forceremoval
c) Use ntdsutil to clean up the metadata. To do so, please follow the steps
in KB 216498 http://support.microsoft.com/kb/216498

I have included the following articles for your reference:
http://technet2.microsoft.com/windowsse ... bf-4f82-a6
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