Multiple emails on different computers were working fine before Tuesday using Thunderbird. All of the sudden on Tuesday, all computers cannot send email, but have no issues on receiving. The "Login to server smtp.office365.com with username @##@.com failed" message appears. I have read all of the issues prior with this message and have made sure everything matches the suggestions and it has been that way since setup and did work fine until Tuesday. Is anyone else having issues? Is it a Microsoft issue? Thanks in advance!