DS_E_COMMUNICATIONS_PROBLEM error

[Chopsy]

We have two Exchange 5.5 servers on different sites, and we're having some comms issues between the two. One site hosts a webmail server, but won't service requests for mailboxes based at the other. It was working previously, and I'm not sure whats changed.

On site A, when I select the site B server in Exchange Administrator, I get a "Microsoft Exchange Directory DS_E_COMMUNICATIONS_PROBLEM" error message.

Both sites are running fine, in terms of servicing their local users, and emails are being received & delivered externally without any problems.

Both sites are running 5.5, site A on Windows 2000 Server, and site B on NT Server.

I can ping from A to B and vice versa, so basic comms seems to be fine. I've checked that all the Exchange services are running at both ends, and have tried restarting.

Any suggestions?

 

[netometer]

Hi!
What is your domain structure – 1 or 2 domains, AD in place?

NetoMeter

http://www.netometer.net

 

[Chopsy]

2 NT domains with a trust relationship in place. No AD.

One more point that may be relevant. We actually have a third Exchange server, and it can connect to site B quite happily, so seems the problem is perhaps at Site A.