John,

Email settings are done by user/by module in Adagio. It's possible your RDP user has a different email setup in Adagio Payables than the other two and the way they connect to their system is a coincidence. Also, the option they're using in the Adagio Payables Email setup, depends on the OS they're using. In Win 7 you have to use MAPI, in Win 10 you can use the Outlook option and there should be no MS Outlook warning. Or you can use direct smtp settings if you continue to have issues with Outlook security.

Either way, it can be a bit of troubleshooting. You often have to get on there and go to the Email setup menu and check it out in each user.