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Demoting NT 4.0 domain controllers

By petergrimes ·
Hi guys !!

This situation is a bit contrived.

Our PDC was shut down.
One of our two BDC's was promoted to PDC.
We now have One PDC and One BDC online.

Can the PDC be demoted offline ?

Bringing it back online and trying to promote the current active BDC, thereby demoting both of the PDC's, doesn't work. It only demotes the currently active PDC.

The Netlogon sevice hasn't started (understandably) on the old PDC as the new PDC stops that service from starting.

Oh, and one more thing. I have absent- mindedly renamed the darned thing (old PDC) when I couldn't demote it immediately, so I may to have to hack the registry or what not.

I can't see any options left to demote this Server and I don't want to have to rebuild it !

Anyone got any ideas.

Thanks in advance,

Peter

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Demoting NT 4.0 domain controllers

by NetTek In reply to Demoting NT 4.0 domain co ...

Check Knowledge Base article Q167248.

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Demoting NT 4.0 domain controllers

by petergrimes In reply to Demoting NT 4.0 domain co ...

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Demoting NT 4.0 domain controllers

by avachon In reply to Demoting NT 4.0 domain co ...

Hi, you may want to try this: This is useful in instances when the PDC crashes or becomes unavailable before you can promote a BDC. However, it may work in the situation you describe. If I understand correctly, you need the old PDC to become a BDC. When you recover and reboot the PDC, it thinks it's still the PDC, but when it discovers the "new" PDC online, the new PDC stops its netlogon service. To fix, edit the default or "<no name>" value of H_Key_Local_Machine\Security\Policy\PolSrvRo. Its value will be 0x03000000 for a PDC and 0x02000000 for a BDC. To turn the PDC into a BDC, change the value to 0x02000000, then reboot. Now, this should take care of the PDC demotion, but I'm not sure about the name change. I'd go ahead and name the PDC back to what it was originally before doing the registry hack. Anway, I hope this helps you.

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Demoting NT 4.0 domain controllers

by petergrimes In reply to Demoting NT 4.0 domain co ...

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Demoting NT 4.0 domain controllers

by drew1k In reply to Demoting NT 4.0 domain co ...

Not sure if you want your Old PDC to become a BDC or a member server. I found and used a program from Algin tech called U-Promote it. What I was able to do was take a BDC which was also my fastdata server and demote it to a member server without losing a single bit of information and then join that server to another domain. You can check out the software at:
http://u-tools.com/UTools/UPromote.asp

Hope that helps...

Drew

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Demoting NT 4.0 domain controllers

by petergrimes In reply to Demoting NT 4.0 domain co ...

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Demoting NT 4.0 domain controllers

by petergrimes In reply to Demoting NT 4.0 domain co ...

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