Outlook 2016 doesn't accept password or app password

Thanks for the reply.

I'm using (and have used) Thunderbird 102, with TBSync for calendar and address book syncing.

As I wrote, service was intermittent for most of the month, but out completely the past two days. Why isn't MS rolling back all changes to late January when its actions caused this situation? I hope you'll agree that consumers shouldn't have to patch our way through a software we pay for.

P.S. I pay for a Microsoft365 personal account and shoudn't get "User Not Found HTTP error 404" when attempting an Office 365 connection. But I do.

@Robdstef,

What is your email client? I don't recognize those account configuration screens. I see ActiveSync in the screens. Open Outlook or Word and click File, Office Account, what Version and Channel are you on?

If you are on M365 then you might be affected by this issue, Outlook Desktop Exchange ActiveSync connections stopped working in Version 2401 - Microsoft Support. If you are on Current Channel then its most certainly this. If this is the issue then follow the Workaround section in that article to revert to a working build.

Gabriel...I'm trying to remain patient and understanding but there are limits. After intermittent working connectivity earlier this week, I now have no connectivity. I've tried actual passwords, app passwords, Exchange setups, Office365 setups. Nothing works.

Today, I again tried what temporarily worked in the past: removing and re-adding the account. Now, I cannot reconnect and now I have no calendar or contacts access.

How much longer must we endure this? PLEASE...HELP!

It looks like an issue affecting individuals' status within the MS database rather than a clash between MS and client sofware, as my 9Folders has had no issues since the remove/add manoeuvre.

Same issue, still not resolved using BlackBerry Hub+ on a Samsung S23+. COME ON GUYS IT'S 24 DAYS SINCE PEOPLE STARTED REPORTING THIS!

I have two Outlook.com Email addresses. Stupidly, I responded to the prompts to change the password for one on 24 or 25 January, while travelling.

I am only able to access this account through Edge on my 'phone, but my desktop Outlook client has not blinked. So, on my desktop, I still have all my calendars in Outlook. (I have another gmail account to do with my sports club and my business account, which is supported by Microsoft, but has its own domain name.)

I didn't touch my other less-used personal account on my 'phone. Since around February 10th I get an alert roughly every other day in BlackBerry Hub+ to reset the password. I ignore it and some time later I will notice either or both of the notification has gone away and that I've received an Email in the BlackBerry Hub+ Inbox.

After the high anxiety of not being able to access my personal Email on my new 'phone, I calmed when I discovered that office.com via Edge on my 'phone at least gave me access, then there was hope at the end of January that Microsoft had resolved this, then increasing irritation. If I am out & about, I have to check two different apps on my 'phone to book appointments: one to check my personal calendar, one to check my sports club and business calendars. And - because some tasks didn't sync - I no longer have my personal tasks on my desktop; I'm storing them all as local tasks on my 'phone.