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New win2k server fails to take over DC from old win2k server

daniel_cw
daniel_cw asked
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Last Modified: 2010-03-29
Hi All,

I'm having some major problems with my windows 2000 server and I'm hoping on some comments and insight into what my problem might be. I've spent almost 60 hours trying to figure this out using all the resources I could find on the web, having done the main reinstall several times. It seems like a simple thing, changing server from one to another, but apparently not so.

Problem:
New win 2k server won't take over as DC for domain.

Setup:
Old server had a minor hardware failure. So investing in some new hardware I then built two "Frankensteinish" servers, the old server still running as usual and the new server with a fresh install of win 2k server (with service pack 4 installed straight afterwards). The old server was the only DC on a win2k network with about 15 clients. It was running AD, DNS and DHCP as the main services. I then dcpromo'd the new server to AD and DNS and added it as an additional server to the existing domain. Then I waited for replication, which worked immediately. I transfered the FSMO's to the new server, which also seemed to work. Finally I changed the Global Catalog to be resident on the new server.

What happens:
The new server doesn't seem to accept it's role as DC and GC controller. I've tried to downgrade the old server with dcpromo, but it refuses saying that there is no DC around. If I just disconnect the old DC and restart the new server and then try to login on a client it says that the domain is not available. If I try to manage the GPO on User & Groups it says that the domain controller is unavailable. Ergo: I can't downgrade the old server, and the new server won't run on it's own. Running them both at once works just fine though.

What I've already checked:
The DNS seems to be in order, and I've cleared cache and rebooted many times. The FSMO's on both servers point to the new one as the controller. The same goes for the GC. I've tried installing DCDiag on both servers, but it keeps on returning error on startup saying it can't find a link library (SP4 problem perhaps?). I've installed the admin tools from the win 2k server CD, but they don't seem to give me much info. Ergo: I can't pinpoint where along the chain something is breaking.

The alternatives as far as I can see:
1) I try to transfer all control back to the old server, format and reinstall the new server and try all the above again (uuurgghhh).
2) I reinstall the new server and recreate the AD & DNS & GPO's by hand (backup and restore of system state is not an option, already tried that and failed). It would take time and I'd probably lose lots in the process as well.
3) Fix the obviously overlooked 'something' and get it all working in 15 minutes flat. What's the something??

Grateful for any help!
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