I recently switched my Windows laptop over to Ubuntu 22.04, and I am trying to get Thunderbird working. The email I use is a University email, and they use Microsoft's servers (office365) and OAuth2 for authentication.
Thunderbird doesn't recognize my email address, so I have to set up all the mail servers manually. The issue is the drop down for authentication method only shows OAuth2 for the incoming server, not the outgoing. So I am able to read all the messages that get sent to me, but I have no means of replying.
I've seen online that many people have this issue sometimes with Thunderbird, but none of their fixes help. I've deleted the .thunderbird directory and restarted Thunderbird, and that hasn't worked. I've also run sudo apt remove thunderbird and sudo apt purge thunderbird then reinstalled it, but that hasn't worked either. I just can't seem to get OAuth2 to pop up.
I'd appreciate any help!
EDIT:Added better screenshots of the outgoing server settings with the authentication method dropdown open and closed.