Outlook 2016 doesn't accept password or app password

Unfortunately, it seems most email clients don't support exchange accounts for personal Microsoft accounts.(paid or free doesn't matter.) I know Mailbird doesn't, at least in version 2.

Those that do, that might work. It would explain why my phone and tablet, both of which support my Microsoft account as an exchange account, have had zero issues with my outllok email account on either.

OAuth2 works fine, but is not an option in some clients.

This link in the article is interesting: https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online 

It confirms OAuth2 has been mandatory for business users for over a year.

It is very likely then that this requirement has been accidentally leaked on to consumer accounts for a large percentage of connection attempts.

Thunderbird published a solution, with switching from basic auth to OAuth2

(didn't try yet, I'm not @ home)

https://support.mozilla.org/en-US/kb/microsoft-oauth-authentication-and-thunderbird-202

"New Outlook" has new terms and condition, and by using it, you agree to send and share all your emails and 3rd party account data with Microsoft. So think and read that before you opt to use it. "New Outlook" on Win11 is a PWA. For MS accounts, it probably doesn't matter, BUT if you access any non-MS accounts, it means MS cloud will be the middle man accessing your non-MS account data and refurnishing it to you on your screen. It's very very different than the Outlook desktop which is a local client. "New Outlook" is a cloud client.

It's like what I read yesterday that on the pc, Microsoft started to make Edge importing tabs from Chrome, even if users have Chrome as default.

If that's true (I don't use Edge and i think that the last time I open it was in October/November)... 🤦🏼

I agree with Frank. I use Mailbird as well and they've been extremely helpful, but obviously disconcerted at Microsoft's lack of a timely resolution.

Mailbird's suggestions to change the server for IMAP only work intermittently. I've been able to get the account to work by completely closing Mailbird and reopening it. Several times a day. This is better than not working at all, but this is completely unacceptable on Microsoft's part.

If Microsoft can't resolve this soon, I'll be canceling my subscription and looking for a different email account.