Hi Experts,
Two queries:
1) Suppose i have a Windows NT PDC and BDC in my organization. And the PDC goes down for some reason. Would the BDC serve to authenticate users. Or is it that i will have to promote the BDC as the PDC. What if i do this and later the PDC that went down comes up again? What sort of situation would this lead to?
2) Today my PDC went down for a while and i had this authentication problem from all users, since they were not able to authenticate themselves through BDC. And my BDC had the above mentioned event logged in the server. The answer to this would definitely be dependent on q1, i guess so.
Thanks in advance.
Rudram(^_^)
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* If the former BDC was promoted while the PDC was offline, then the former PDC should be demoted once it comes back online, yes.
* Replication can be forced/checked with nltest.exe:
Domain Secure Channel Utility -- Nltest.exe
http://support.microsoft.c
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Answer for Membership
by: oBdAPosted on 2009-06-15 at 09:21:35ID: 24630380
The BDC should be able to authenticate users; the one thing that won't work is any write access to the domain database, like password changes, group membership changes, new users, ...
Name resolution is the main problem preventing successful authentication. Assuming the PDC is running WINS, make sure that
* the BDC is running WINS as well,
* that both DCs are replicating WINS,
* that both DCs point *only* to themselves in the WINS server list
* that all clients are using both WINS servers
In case of an extended downtime of the PDC, you might have to promote the BDC to PDC, which will obviously cause trouble once the PDC comes back online. Check here on how to resolve this:
How to Demote to BDC When Two PDCs Present
http://support.microsoft.c