Authentication must be Oauth2 and be sure to use complete email address

Authentication must be Oauth2 and be sure to use complete email address

I have Oauth2 in the outgoing server settings and have complete email address

Just to share a thread. I do not use Outlook and cannot advise on a solution, but I noticed this similar thread that found a solution. That thread is at https://support.mozilla.org/en-US/questions/1400644 It's rather long, but interesting. They solved what appears to be the same issue by disabling ipv6 in config editor. I hope it may work for you. From their post, there seems to be a Microsoft problem with ipv6. Good luck.

I deleted and added it again. Now it goes as far as looking for folders then"user authenticated but not connected". It has aOAuth2 password

The following link might be helpful: https://support.mozilla.org/en-US/questions/1473104#answer-1712116

Thanks everyone. I'm not sure whose link found it at

Here's how I solved it Thunderbird has to be set up correct server settings etc Log into Outlook email on browser Click the gear top right Forwarding and IMAP POP and IMAP at the bottom Enable whichever one you want POP or IMAP or both

see screenshot