Thunderbird 115.2.0 - o365 - Windows 11
Every day since upgrading (4 days ago) I have to sign in to Outlook in a browser and click on "This is me" as Thunderbird fails to connect with a message along the lines that I have to sign in with a browser. It is fine with my Gmail and works until the next day with Hotmail after the above procedure. There was no problem with the previous version of Thunderbird regarding this.
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SMTP settings: Outlook.com (Microsoft)
- outgoing smtp server: smtp.office365.com
- Port 587
- Connection Secuiryt: STARTTLS
- Authentication Method: OAuth2
Is user name set up as full email address ? If no, then edit User Name.
Do you have any VPN operating - if yes, switch it off. Do you have anything currentlly using localhost eg: Apache ? If yes then switch it off until you have reset oauth.
Do you have cookies enabled ?
- Settings > Privacy & Security
Web Content
- select 'Accept cookies from sites'
Did you try a complete reset of password to get new oauth ?
- Settings > Privacy & Security
- Scroll to Passwords' section
- clickon 'Saved Passwords'
- click on 'Show Passwords'
- Remove all outlook account stored passwords
- if pop: mailbox://..account
- if imap: imap://..account
- smtp : smtp://..account
- oauth://account...
Restart Thunderbird and a pop up browser style window will ask for email address and password to allow Thunderbird access to server.