Migrating to Linux after the latest Copilot/Recall issue yesterday. Setting up Thunderbird for my Microsoft O365 accounts (I have 5 companies I support). Automated setup for IMAP/SMTP was smooth and no issues. All settings are correct within the application itself. I'm an admin of 3 of companies for O365, and I can confirm that the settings in the app are set correctly. However, when attempting to send the application will not forward the message. No message inside O365 to indicate why not.