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The DCDiag might be a false positive if this is a W2008 Replicating Only DC; see: 
<a href="http://technet.microsoft.com/en-us/library/cc754463.aspx" rel="ugc nofollow">http://technet.microsoft.com/en-us/library/cc754463.aspx</a> 
 
Did you run adprep before you added the 2008 server?
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The DCDiag might be a false positive if this is a W2008 Replicating Only DC; see:
http://technet.microsoft.com/en-us/library/cc754463.aspx [http://technet.microsoft.com/en-us/library/cc754463.aspx]

Did you run adprep before you added the 2008 server?

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<div class="content wysiwyg-content">
I recently had to seize roles on a DC running 2008 from a DC running 2003 that had crashed. 
 
I can see the user objects but there are no computer objects in AD on just this one DC. 
 
I have checked my other DC's running both 2003 and 2008 and they show both object types. 
 
I ran DCdiags and found this : 
 
---- 
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=ForestDnsZones,DC=fbc,DC=internal 
Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have 
 
Replicating Directory Changes In Filtered Set 
access rights for the naming context: 
 
DC=DomainDnsZones,DC=fbc,DC=internal 
......................... DC8 failed test NCSecDesc 

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</div>

I recently had to seize roles on a DC running 2008 from a DC running 2003 that had crashed.

I can see the user objects but there are no computer objects in AD on just this one DC.

I have checked my other DC's running both 2003 and 2008 and they show both object types. 

I ran DCdiags and found this :

----
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=ForestDnsZones,DC=fbc,DC=internal
Error NT AUTHORITY\ENTERPRISE DOMAIN CONTROLLERS doesn't have

Replicating Directory Changes In Filtered Set
access rights for the naming context:

DC=DomainDnsZones,DC=fbc,DC=internal
......................... DC8 failed test NCSecDesc


Computer Objects Missing in AD

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).