I am trying to figure out what server settings need to change in order for my outlook clients to have a better chance of success connecting to their mailbox. our internal domain name is something.local and our email domain is somethingdifferent.com.
here is what happens when I try to configure an outlook client offsite (w/out vpn).
outlook asks for their name, email address and password. users can generallyget that right and it moves to the next step and it brings up a box with their email address as their username. users assume that is correct but their password doesn't work because they should be clicking 'other user' and change the username from 'email address' to internaldomain\theirusername. it brings that up 2 or 3 times before it's successful.
so, what I would like to know is, what setting(s) should I be looking for that would make that first credentials box pop up with internaldomain\firstpartofemailaddress instead of their email address.
phones do the same thing, it starts out asking for just email address and password as if that is all you 'should' need but it comes in partially successful but they still have to fix the username to internaldomain\username. and the server address comes in something.com but it always has to be changed to mail.something.com before it'll work. I'd like to see if there is a way that it could already know the correct server address.
I figure that since both outlook and phones start by asking only email address and password, there should be some combination of settings that would allow valid credentials at step1 to be enough to connect.
Exchange 2013 mail server and both of my domain controllers are server 2003.
Thanks, Tony McPherson