At a customer’s site while testing an upgrade procedure from SMS 2003 to
ConfigMgr 2007, I’ve faced a problem in extending the Active Directory Schema;
or actually re-extending the Active Directory schema as it was extended using
SMS 2003. However the ExtADSch.log file on located on Drive C kept generating
the below error:
12-16-2008 11:28:07> Modifying Active Directory Schema -
with SMS extensions.<12-16-2008> DS
Root:CN=Schema,CN=Configuration,DC=customer,DC=net<12-16-2008> Failed to
create attribute cn=MS-SMS-Site-Code. Error code = 8206.<12-16-2008>
Failed to create attribute cn=mS-SMS-Assignment-Site-Code. Error code = 8206.
After investigating and inspired by the below TechNet Forum problem
http://social.technet.microsoft.com/forums/en-US/configmgrsetup/thread/296853d7-804f-4307-8f3d-797355fa9fa7/
Well, reading the reply posted by ‘Stefan Schِrling - MVP’ I figured that
the problem is due to a combination of scenario #2 and #3 in his reply. I found
that when the customer built the test lab for testing purposes, he only
connected one of his two domain controllers! So he actually created two domain
controllers for the test lab, then he totally disconnected one of them without
decommissioning or what so ever. After re-connect the removed domain controller
and re initiate a replication cycle between the two domain controllers. The
replication didn’t take place and the domain controllers were unable to talk to
each other. After running replication monitor of the Windows Support tools the
replication monitor kept displaying error 5: ‘Access is Denied’.
Trying to
resolve the problem with the Domain Controllers I’ve tried articles
http://support.microsoft.com/kb/329860
and
http://support.microsoft.com/kb/329873
including other resources on the web, nothing seems to fix the problem in the
domain controllers replication; maybe because the domain controller disconnected
badly from the test environment and it was kept away for too long. On the other
hand I’ve even tried to demote the domain controller in an attempt to stop any
replication attempt while extending the Active Directory Schema, but for sure
that didn’t work because the target domain controller for de-promoting couldn’t
contact the other domain controller. Linking that to our initial problem of
Active Directory Extension Failure, I came to a conclusion that if the real
production environment has no replication issues, I will not face the same
errors when I try to re-extend the Active Directory Schema for ConfigMgr 2007.
Re-extending the Active Directory Schema successfully on the production
environment made me believe that what I’ve faced in the lab setup prepared by
the customer was a replication issue between DC's.
Posted
02-09-2009 1:30 PM
by
Asem Alhourani