for a couple of months I was running exchsync tool to sync free/busy data for our CA and US sites but it stopped working.
I checked the setting as per the install procedure, the permissions are all there, the links a re working from the servers, the running account password is good.
I installed it on another server and same problem
The message is Exchange Replication Configurator/ Unable to log on to Exchange Server using mailbox information.
Too bad it doesn't specify which exchange mailbox it is talking about! Is it the publisher or the subscriber?
Also since this tool is one-way, it's also installed on the US site Exchange server and it stopped at the same time.
Don't thing it could be firewall related but cannot confirm either.