The site I am at had two domains. DomainA is the main internal domain for the network and I haven't don't anything there, DomainB was in fact just a single Windows 2000 DC in a domain of its own, it lived in their DMZ and hosted IIS and their OWA service by having Exchange 2000 Server setup as a front end.
I have decommissioned the Front End server and demoted the DC so that DomainB no longer exists. I appear to have missed something out though because I get Event ID 8270 as follows:
LDAP returned the error  Unavailable when importing the transaction
This Event is logged 2 times, on an hourly basis. The GUID is identical in both occurences.
The event is then logged another 2 times 1 minute later with a second, different GUID.
MSKB article 313267 refers to this situation and suggests that I correct a missing group membership using AD Users and Computers, adding the "Exchange Domain Servers" group from the remote domain (in this case, DomainB)
Of course I can't do that because DomainB doesn't exist any more.
Can you suggest a way I can stop my DC, or my remainging Exchange Server or whatever it is that is trying to talk to something in DomainB, stop it from trying any more? Some kind of manual process of removal?
I have looked in every properties dialog in Exchange System Manager, the old Exchange front end server is not listed anywhere any more. I have also checked in AD USers and Comptuers, Group Policy and AS Sites and Services, and Domains and Trusts.
I guess I might have to fire up ADSI edit and hunt down the GUID? Remove references to it manually? I'm scared of ADSIedit. It is dangerous.
Advice greatly appreciated,