Windows 2003 DNS; non-existent DC set as delgation under forward zone

I was doing some dcdiag /test:dns commands and found the delegation test was failing. After looking at the results I found a delegation to a dc that no longer exists. I’m in the process of going to a 2008 functional level and would like to get the bugs worked out before converting.

---Snippet of dcdiag results-----------------------------------------------------
TEST: Delegations (Del)
                  Delegation information for the zone: mydomain.org.
                     Delegated domain name: _msdcs.mydomain.org.
                        Warning: DNS server: old-dc.mydomain.org. IP: <Unavailable> Failure:Missing glue A record
                        [Error details: 9714 (Type: Win32 - Description: DNS name does not exist.)]
---------------------------------------------------------


Current Setup:
3 - DC's ( 2 - Windows 2003, 1 -Windows 2008 R2)
All FSMO roles are shared between the 2003 DC's
2003 Functional level.
DNS running on all DC's. Active Directory Integrated


Ill attach a screenshot of the DNS zones.

My question is can I delete this delegation or edit the entry and put the current dc in its place. Everything else appears correct under the _msdcs zone and the mydomain.org zone with the exception of this entry. I’ve checked ADUC under domain controllers and no such entry existed for old-dc also nothing exists under sites and services with the old-dc server name. The remaining dcdiag dns tests Passed with the exception of the 2008 server but that’s another question for another post.

Thanks in advance for the help.
dns.JPG
comm1cccAsked:
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footechCommented:
Yes.  Just right-click the _msdcs delegation and go to Properties.  On the name servers tab of the window that pops up, you can add, remove, or edit where this points to.
comm1cccAuthor Commented:
Ok. Thanks for the info.

1. Should I add delegations to all of the DNS servers or just the authoritative server?
2. Once the above question is completed should I enter the information manually on one server and let it replicate or should I enter the info manually on all DC's.
footechCommented:
I would add delegations to all servers which are authoritative.  If the _msdcs zone is AD-integrated, then all DCs with DNS are authoritative (most likely in this scenario - the answer could be a little different depending on replication scope).

If the zone containing the delegation is AD-integrated, then it (including with the delegation) will replicate to the other DCs with DNS as defined by the replication scope.

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comm1cccAuthor Commented:
Thanks for the info.

I added all of the DNS servers to the zone and deleted the former entry and everything is testing fine
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