Outlook (exchange) with the help of Owl was working in Thunderbird until yesterday. Microsoft has a recurring issue (aside from the Thunderbird issue) in which you keep being asked to "fix" your Microsoft account by logging in again. Many people have reported this issue to Microsoft. In Thunderbird, this was workable because Thunderbird would simply display the login page, able to login each time Thunderbird opens to retrieve Outlook messages This no longer works. Now, the Login page for Outlook flashes on and immediately closes, with the message in the bottom tray reading: "login expired. please log in to your account and try again." No way to do that but to launch Thunderbird again, and the situation happens again. If I add this same outlook account AGAIN within the same session, that account receives my messages, after which I delete the first Outlook account from Thunderbird.. every time. Not a workable situation. I love Thunderbird for all my pop and imap accounts and really don't want to have to use two apps.