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Greyed out _msdcs container under my dns domain

Posted on 2014-11-20
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Last Modified: 2015-03-17
I had one Windows 2003 DC running DNS and DHCP  (London-DC1) , recently I added two new Windows 2008 Domain Controllers with DNS (London-DC2 and London-DC3). Currently my DNS zone looks like following

--Forward lookup Zone
  _msdcs.treaty.local

            ---- London-DC1  (ns server)
            ---- London-DC2  (ns server)
            ---- London-DC3  (ns server)

-- treaty.local

      -- msdcs  (this container is greyed out)

                  ---- London-DC1  (ns server)

Question is why the greyed out _msdcs container has only one ns server record. Should there be 3 ns records or just 1 ns records? And why?
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Question by:adding7
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footech earned 500 total points
ID: 40455276
The grayed-out _msdcs is a delegation.  These don't update automatically.  You likely wouldn't see any issue if you just have a single domain with the delegation as is.  It's best though to have the delegation point to any name servers that have the _msdcs zone (which is usually replicated to all DNS servers in the forest).
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Author Comment

by:adding7
ID: 40455433
thanks for the update, just one quick question regarding this.....   I understand I can create this manually.

Shouldn't  this delegation records gets created during dcpromo - when I installed 2 new dc's?

Also authorative DNS server is London-DC2
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Expert Comment

by:footech
ID: 40455511
No, the delegation gets created when you first set up a domain, but other than that it is a manual process to update it.
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