Using Outlook for Android in business environments for email and scheduling
How are you setting it up? Are you using Exchange?
When you set up the Exchange account in the Outlook app do the following:
Domain: leave this field blank
Username: type in your whole email address
Sadly I'm not using Exchange. It is a Yahoo account. The account is recognised when I select, "ADD ACCOUNT", as it shows at the top of the page as "Account Selected". However it then gives the authentication error when trying to get to the next stage. It's all very frustrating.