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Replacing NT4 PDC with NT4 BDC

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by travishead

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Thanks in advance for the help!
We have an NT4 network at the office (I know, I'm pushing to upgrade). The old admin had the DMZ's PDC set up on an NT4 box with Exchange 5.5.
We're currently having some mail trouble and demoted the mail server to BDC in case it has to go offline.
The promotion/demotion went fine, both the new and old DC's see each other as they should be (both aggree who is PDC and who is BDC) my only concern is that when you log into a server in the DMZ and run 'set' and the commandf promt it shows the DMZ servers as still authenitcating to the OLD PDC (the mail server).
I'm wondering, is there any way to push/pull the DMZ server into authenticating to the new PDC? I know whne a PDC goes offline the other member servers have existing credentials cached for some time, so they can still authenticate without having to talk to the PDC, but when that cach expires or we take the Mail server offline, will these member servers be able to switch over to the new PDC?
Is there any way to test this switch???
Thanks again!

2 replies

by bfilmfan

Use Netdom to force the DMZ member server to re-establish a secure channel with the new PDC.

by travishead

Thanks for the quick reply. I've since been investigating the NetDom utility. Seems quite usefull.
The issue here turned out to be more of a name resolution issue. The DMZ was reliant on WINS for name resolution and there was a static mapping to the Old PDC as the master browser. Anyone attempting to contact the new PDC via WINS was being pointed to wring server altogether.

I will definatly be using NetDom in the future though.

Thanks again!
Travis

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