For Office 365 I use DavMail [0] for calendar, and Office 365's own SMTP/IMAP servers for mail. Both seem to work well. It would be nice to have DavMail built

For Office 365 I use DavMail [0] for calendar, and Office 365's own SMTP/IMAP servers for mail. Both seem to work well. It would be nice to have DavMail built in to Thunderbird, but it happily lives in a Screen session with no issues. [0] http://davmail.sourceforge.net/ http://davmail.sourceforge.net/