Eseries / Communicators :: E7 - Mail For Exchange - Cannot Edit "Server Name

I've purchased an E7 yesterday and proceeded to try to get Mail for Exchange set up with work.When I entered the value for the "Server name" I entered (the equiv of) myserverdomain.com/owa. The connection failed to connect and I suspect I should have simply put the domain name (not the owa bit) BUT when I go to "Options > Settings > Mail for Exchange > Mailbox" I cannot change the "Server name" field - tapping it does nothing.More generally, I CAN edit: { Mail, Password, Include Signature } and I CANNOT edit { Mailbox, Username, Servername, Domain).