DCPROMO Demotion

[Guest]

When I try to demote a domain controller to a member server, I receive the
error, "The operstion failed because: Binding to server servername.domain.com
using the supplied credentials failed. The user has not been authenticated.
I logged onto the server using the administrators account, however.
Any advise in regards to this issue would be deeply appreciated.
Thank you.
Al

 

[Herb Martin]

When I try to demote a domain controller to a member server, I receive the
error, "The operstion failed because: Binding to server servername.domain.com
using the supplied credentials failed. The user has not been authenticated.
I logged onto the server using the administrators account, however.
Any advise in regards to this issue would be deeply appreciated.

Usually such problems (finding DCs and authentication) are DNS related.


DNS for AD
1) Dynamic for the zone supporting AD
2) All internal DNS clients NIC\IP properties must specify SOLELY
that internal, dynamic DNS server (set.)
3) DCs and even DNS servers are DNS clients too -- see #2

Restart NetLogon on any DC if you change any of the above that
affects a DC and/or use:

nltest /dsregdns /serverC-ServerNameGoesHere

Ensure that DNS zones/domains are fully replicated to all DNS
servers for that (internal) zone/domain.

Also useful may be running DCDiag on each DC, sending the
output to a text file, and searching for FAIL, ERROR, WARN.