Fix Outlook 2016 autodiscover service prioritize O365 server, while mailbox is on Hosted Exchange
On January 9 update Outlook 2016 purchased in O365 license will desperately try to find Office 365 server and end up locating temporary mailbox @outlook.com, while actual mailbox is hosted on Exchange Server somewhere else. Registry keys won't help to skip this autodiscover lookup. The only working fix now is rolling back the updates.
I have had to help at least 4 customers on this “mailbox has been moved” issue.