Please help me, this is driving me mad!
First a little of the history:
We have 2 domains 3b and 4d and they have a trust between them.
3b was a NT4 pdc upgraded to 2003 std server and DNS added (called DC3)
2 more 3b DCs were created both with DNS as I want to remove DC3
All the member servers in the 3b domain have dc1 or dc2 as their logon server in environment variables
dc1 and dc2 have all the fsmo roles and the ad schema transferred to them
Nothing is running WINS or LMhosts
When I stop dc3 after an hour or so, delays start occuring in the data transfers between member servers, and the trust between domains stops trusting on the basis that it can no longer locate a logon server.
If I try to re-establish the trust without dc3, I get the cannot find logon server message.
If I stop the Server service on dc3 (Server, logon and browser stop) everything stays ok
When I stop the DNS service on dc3 the trust stops and I get delays after about an hour.
Does anybody have any ideas what could be causing this - I do not want to demote dc3 until I know for definite that the domain and the servers will be stable without dc3.
Thanks in advance