Ok, I checked and guess what. Step 3 for registering DEFHR.org has never been finished. I was afraid to finish it for fear of knocking the other 16 users off of email.
But that being said, everyone else has a DEFHR.org email address as their primary email in 365 and they all seem to work. They are all on automatic exchange and they all have different server names it seems (xxxxxxx.mailbox.outlook.com).
And now the Outlook is hosed. It only goes off line and it will only let me set a server address and name other wise it fails and closes outlook. Any help would be appreciated.