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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.
Same with 9Folders.
Quite. There's really no reason for those apps not to support OAuth2 on personal accounts. If I used those apps, I would be asking for an explanation.
Same with 9Folders.
Customers of these email clients really should be asking their email client developers why they do not support OAuth2 on Outlook.com accounts. App passwords are a workaround for older email clients which never added OAuth2 support.
Mailbird only supports OAuth 2.0 for exchange accounts, but not for personal outlook accounts.
Thank you for your attention to this issue, and in particular for the follow-up to keep people posted, rays of light amidst a storm of obfuscation.
FWIW, in MS Office 2021 Pro Outlook on Windows 10 Pro and Fair Email on android, which both experienced rapidly but variably repeated password requests for each of multiple accounts in the profiles since the start of this issue, are now both performing as expected.
Thanks again.
Customers of these email clients really should be asking their email client developers why they do not support OAuth2 on Outlook.com accounts. App passwords are a workaround for older email clients which never added OAuth2 support.