We are running Windows 2003 domain environment, we have 2 domain controllers running windows 2003 server, and we have one Exchange 2003 server running under Windows 2003 servers. The Exchange server is connected to primary domain controller very closely, we also have 10 sites, each site has its own domain controller running windows 2003 server, all sites servers are performing replication process to each other and primary domain controller.
The exchange 2003 server is running very well for both MS outlook and outlook web access for past 8 years.
For Exchange 2003 outlook web access, we never have any problem, people is able to access outlook web emails from home or other locations. Today, staffs are able to connect the outlook web by typing http://mail.domain
name/exchange, BUT, nobody is able to open the web email by typing Correct Password, and get ACCESS Deny.
Is this causing by Virus? or something else causing Access Deny? I have stopped and Started IIS on exchange 2003 server, but the problem still can't be resolved.
Thank you and please help,