Yes, Microsoft new requirements for use of oauth2.0 to log in are something of a pain, but they were imposed by Microsoft.

The page you show is an incomplete rendering if a web page served by Microsoft to authorize log in. The issue is why is it not rendering.

A couple of options are your internet security product is blocking the connection (quite probable if you are using something other than Microsoft defender.) You have cookies disabled in Thunderbird (they are required for oauth authentication.

Matt, thank you for your quick response. I have TB set to accept cookies, and always 3rd parties. I didn't change anything in any of my settings for either Nortons, Firefox, or TB in probably a year or two, and everything was working. The only constant that changed was your update. I've never had that MSN page not fully render in the past, on the rare occasions MSN has asked me to verify my account. Not sure if Nortons could be the issue, but, I didn't make any changes recently. I'm not sure how to change the log in for the oauth2.0 or even how to find out how to.

I do receive incoming emails through TB. I just can't send anything out unless I go to Outlook and sign in directly and use their software. Signing in to them works fine, I just can't stand Gates or MS.

Thank you for your time. Sorry I was pissed, I was having a real bad day.

Chris

I never know which version of Outlook is being referenced. If you are using the non-Exchange version, my settings are imap.office365.com, SSL/TLS, 993, OAUTH2 for incoming and smtp.office365.com, 587, STARTTLS, OAUTH2 for outgoing