We have 3 domains and one Exchange server. Users from all 3 domains have email accounts on the Exchange server and are able to access their email from their home domain without any problems, usually. Yesterday users on one of the domains became unable to login in to their email accounts. As far as I can tell nothing has changed to cause this. I initially thought the problems was the trust between the domain with the Exchange server and the other domain, but after deleting the trust and rebuilding it I have the same problem. What would cause users one one domain to no longer be authenticated by Exchange?
If you are getting eany event please post.
you can alo check your all Dc replication are running ot not.