Outlook 2016 doesn't accept password or app password

IMAP using OAuth2

stop throttling to death

time stamps are PDT

Not surprising... Microsoft has a collab with Samsung to pre-install MS apps on Samsung phones or at least a variant of Samsung phones. Microsoft and Google are in head-on competition, so Microsoft takes every chance to stab Google. In Chrome browser, if if I switch Bing to search, it will only nag me once. However, if I switch to Google for search or web apps in Edge, it will constantly nag me and import my Google Chrome data without consent. Microsoft is the new evil in tech.

I am very sure it's not the mail app or calendar app, it's the EAS protocol access stack.

I verified now that EAS is working like a charm on Android also for consumer accounts (outlook.com paid or free) authenticated via Oauth (aka "modern authentication") - if I use for example the app "Samsung Email". The integeration with calendar and contacts apps is also working as expected.

So the problem is isolated to the Oauth implementation of the Gmail App. I contacted google via in-app-help and as a result, a support ticket was opened. I am curious whether I get an answer from a human who understands the problem ;-)

Give it time.... It will challenge you for credentials...again and again and again...

When you add the account are you choosing "Manual setup or additional server types" Then selecting "Outlook.com or Exchange ActiveSync compatible service"? Entering in the Mail server as "outlook.office365.com" ? The type of account should then be Exchange ActiveSync, worked so far for me.