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I have this problem - Outlook 2016 doesn't accept password or app password - and i think it is a growing World wide Microsoft problem :-(
See also here: https://www.reddit.com/r/Outlook/comments/19dx64p/outlook_2013_windows_10_suddenly_not_accepting/Outlook gives me this: (startede yesterday)
I have 2 PC's with HOTMAIL accounts in Outlook 2016 ...
They both have this error.
I do get mails ... but I can´t send mails. Yesterday it did work for 1-2 hours ... but right now the error is there all the time :-(
Please help me.
Thanks in advance
Pierre
Using classic Outlook for Windows in business environments
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
It seems to be more stable but not fixed yet. Had a connection at work today in the WLAN there but when switching to mobile network I got a password prompt.
It was persistent also in my home WLAN after I arrived at home, but now automatically switched to work again.
Mine has had no prompts for 2 days. I was just testing some stuff on my wifi network with my phone, switched between several SSIDs, mobile network, disconnected and reconnected my home internet, etc. Then I did get a prompt, but I tapped it, and it went away and is working fine (where before it would immediately say check your credentials, and I'd have to bounce internet on the phone to get it to work).
So still not quite how it was before, in the past it never brought up anything like that even when I did similar testing etc. But at least now it is accepting the credentials right away (message probably would have gone away on its own).
I wish Gmail android would support modern auth for exchange and not just IMAP. Don't really feel like using the outlook client. Guess we'll see if they ever get it all sorted out and clean. At some point we'll all have to use modern auth and 2FA so if Gmail doesn't get with the program (Samsung's email client works fine with it) may have to switch to the outlook app. I use it for my work profile and it is just too bloated and clunky to use for personal email. Maybe the "lite" version is better.
Windows 10 22H2 on Surface Pro 3 running Outlook 2013 - same boat for the last two weeks
Was getting password prompting w/o 2FA or App password every few minutes. Would sign in 3 times, then cancel. Outlook would connect for a while, then prompt again. Rinse and repeat multiple times a day.
Been watching this thread and checked the Reddit page today. Saw this link and gave it a try: https://azvise.com/2022/08/23/enable-modern-authentication-for-outlook-2013/
Updated Regedit > Closed/re-opened Outlook
I know it's not "the" fix for MS's issue, but might help as a work around for the moment.
So far, in the last 3 hours, no prompts. Will update this again in another day.
Another authentication error. 2 outlook.com accounts. Immediately took the sign-on credentials, but issue obviously not resolved. This was on 9Folders. Also, server authentication error on 3 outlook accounts on Thunderbird just now. Again, reset and retrieved and all worked. Nonetheless, the consistent failure of login credentials continues on MS servers.
This issue has now reappeared, it worked for the last 2 days but now asks for the password again when logging in to outlook office 2016 professional plus