Cep <Cep@> requesting assistance, typed the
following:
Sounds like you may have had a replication issue at one point as well. It
could have been caused by this, it may not have been caused by this. Either
way, the error, even though it doesn't make sense, is due to the dupe. The
following is a copy/paste from my blog at www.fekay.com showing the full
method to clean it all up. It involves picking one DC (only one), and
removing the zone from AD (make it no AD integrated), so it is now a Primary
Standard zone. Then allow replication to happen. Then do the ADSI Edit
deletions, but this time delete ALL references to the zone (not the
ForestDnsZones, just the zones in DomainNC and DomainDnsZones).
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Conflicting AD Integrated zones if they exist in both the Domain NC and
one of the Application Partitions or if you get a weird error message
stating:
Under Windows 2000, the physcial AD database is broken up into 3 logical
partitions, the DomainNC (Domain Name Context, or some call the Domain Name
Container), the Configuration Partition, and the Schema Partition. The
Schema and Config partitions replicate to all DCs in a forest. However, the
DomainNC is specific only to the domain the DC belongs to. That's where a
user, domain local or global group is stored. The DomainNC only replicates
to the DCs of that specific domain. When you create an AD INtegrated zone in
Win 2000, it gets stored in the DomainNC. This causes a limitation if you
want this zone to be available on a DC/DNS server that belongs to a
different domain. The only way to get around that is for a little creative
designing using either delegation, or secondary zones. This was a challenge
for the _msdcs zone, which must be available forest wide to resolve the
forest root domain, which contains the Schema and Domain Name Masters FSMO
roles.
In Windows 2003, there were two additional partitions added, they are called
the DomainDnsZones and ForestDnsZones Application Partitions, specifically
to store DNS data. They were conceived to overcome the limitation of Windows
2000's AD Integrated zones. Now you can store an AD Integrated zone in
either of these new partitions instead of the DomainNC. If stored in the
DomainDnsZones app partition, it is available only in that domain's
DomainDnsZones partition. If you store it in the ForestDnsZones app
partition, it will be available to any DC/DNS server in the whole forest.
This opens many more design options. It also ensures the availability of the
_msdcs zone to all DCs in the forest. By default in Win 2003, the _msdcs
zone is stored in the ForestDnsZones application partition.
When selecting a zone replication scope in Win2003, in the zone's
properties, click on the "Change" button. Under that you will see 3 options:
To choose the ForestDnsZones:
To choose DomainDnsZones:
To choose the DomainNC (only for compatibility with Win2000):
If you have a duplicate, that's indicating there is a zone that exists in
the DomainNC and in the DomainDnsZones Application partition. This means at
one time, or currently, you have a mixed Win2000/2003 environment and you
have DNS installed on both operating systems. On Win2000, if the zone is AD
Integrated, it is in the DomainNC, and should be set the same in Win2003's
DC/DNS server to keep compatible. Someone must have attempted to change it
in Win2003 DNS to put it in the DomainDnsZones partition no realizing the
implications, hence the duplicate. In a scenario such as this where you want
to use the Win2003 app partitions, you then must insure the zone on the
Win2003 is set to the DomainNC, then uninstall DNS off the Win2000 machine,
then once that's done, you can then go to the Win2003 DNS and change the
partition's replication scope to one of the app partitions.
In ADSI Edit, you can view all five partitions. You were viewing the app
partitions, but not the main partitions. You need to add the DomainNC
partition in order to delete that zone. But you must uninstall DNS off the
Win2000 server first, unless you want to keep the zone in the DomainNC. But
that wouldn't make much sense if you want to take advantage of the _msdcs
zone being available forest wide in the ForestDnsZones partition, which you
should absolutley NOT delete. I would just use the Win2003 DNS servers only.
In ADSI Edit, rt-click ADSI Edit, connect to, in the Connection Point click
on "Well known Naming Context", then in the drop-down box, select "Domain".
Drill down to CN=System. Under that you will see CN=MicrosoftDNS. You will
see the zone in there.
But make sure to decide FIRST which way to go before you delete anything.
Some reading for you...
Directory Partitions:
http://www.microsoft.com/resources/documentation/Windows/2000/server/reskit/en-us/distrib/dsbg_dat_favt.asp
kbAlertz- (867464) - Explains how to use ADSI Edit to resolve app partitions
issues:
http://www.kbalertz.com/kb_867464.aspx
How to fix it?
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What I've done in a few cases with my clients that have issues with
'duplicate' zone entries in AD (because the zone name was in the Domain NC
(Name Container) Partition, and also in the DomainDnsZones App partition),
was first to change the zone on one of the DCs to a Primary zone, and
allowed zone transfers. Then I went to the other DCs and changed the zone to
a Secondary, and using the first DC as the Master. Then I went into ADSI
Edit, (from memory) under the Domain NC, Services, DNS, and deleted any
reference to the domain name. Then I added the DomainDnsZones partition to
the ADSI Edit console, and deleted any reference to the zone name in there
as well. If you see anything saying something to the extent of a phrase that
says
too. Everytime
you may have tried tochange the replication scope, it creates one of them.
Delete them all.
Then I forced replication. If there were Sites configured, I juggled around
the servers and subnet objects so all of the servers are now in one site,
then I forced replication (so I didn't have to wait for the next site
replication schedule). Once I've confirmed that replication occured, and the
zones no longer existed in either the Domain NC or DomainDnsZones, then I
changed the zone on the first server back to AD Integrated, choosing the
middle button for it's replication scope (which puts it in the
DomainDnsZones app partition). Then I went to the other servers and changed
the zone to AD Integrated choosing the same replication scope. Then I reset
the sites and subnet objects, and everything was good to go.
Keep in mind, I left the _msdcs... zone alone, since that wasn't causing any
problems and is located in the ForestDnsZones (default) in all of my client
cases I've come across with so far.
It seems like alot of steps, but not really. Just read it over a few times
to get familiar with the procedure. You may even want to change it into a
numbered step by step list if you like. If you only have one DC, and one
Site, then it's much easier since you don't have to mess with secondaries or
play with the site objects.
I hope that helped!
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