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Thunderbird Stopped being able to send mail through office365

Thunderbird Send and receive email
cathal58
cathal58

Hi Support,

For the past few days I have been using Thunderbird as my mail app for office 365 account and it has been working however today I have attempted to send an email and it has stopped being able to. I get prompted to re-enter the password go through the login and the 2FA and then get to the "You're all set" response page and when I go back to the thunderbird app I get prompted to re-auth again.

Are there any troubleshooting steps I can follow to find out at what stage it is failing?

I have it configured for smtp-mail.outlook.com with port 587, StartTLS and OAuth2 selected. A username is also configured.

Hi Support, For the past few days I have been using Thunderbird as my mail app for office 365 account and it has been working however today I have attempted to send an email and it has stopped being able to. I get prompted to re-enter the password go through the login and the 2FA and then get to the "You're all set" response page and when I go back to the thunderbird app I get prompted to re-auth again. Are there any troubleshooting steps I can follow to find out at what stage it is failing? I have it configured for smtp-mail.outlook.com with port 587, StartTLS and OAuth2 selected. A username is also configured.

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