I have a child domain and a parent domain setup on Active directory. Parent domain is xyz.com and the child domain is abc.xyz.com. The exchange servers for the whole enterprise is under the parent domain and everyones email address is firstname.lastname@example.org.
The issue I'm having is I cannot get the users in the child domain to connect on outlook. Outlook gives a message "You do not have permission to log on", it never gives you an option to put a user name or password with a different domain name.
How do I resolve this?