This is my second plea for help in a week, so I feel extremely helpless, but I can't figure this out, and my university's IT desk is also apparently clueless about Thunderbird. So, our email system just switched over from Gmail to Office365, and this means, in order to get to my email, I either have to navigae through the student website to the Office365 site, to the online Outlook app, which is just a pain; OR it means using an email client - and I outright refused to use Outlook. So I set up Thunderbird, and I got my emails in my inbox, but when I try to send them, it refuses to send through any server. I tried the default SMTP server, I tried our server (outlook.office365.com), tried both with different port numbers, and neither will work.
When I called the IT desk, the guy said that if I had SSL on (which I do) I shouldn't have to worry about SMTP. And I have it set up on my phone through an exchange account where I do indeed not have to worry. So I tried downloading the ExQuilla extension. That didn't work either. So, in sumation, I am completely dubfounded, and I have no idea what to do. Any help that anybody would be willing to give me would be GREATLY appreciated, considering the fact that I can only have any academic communication through this email.
tl;dr - My school email, which is run through Office365, won't play nice with Thunderbird, and I can't figure out why.
Running: Thunderbird 31.0