5/5 TbSync was a small challenge because, as has happened in the past with major Thunderbird updates, it was declared unsupported and automatically disabled by Thunderbird 140esr. Following the instructions in https://github.com/jobisoft/TbSync/issues/753#issuecomment-3051737579 (file-based reinstall of TbSync and EAS-4-TbSync) resolves the issue for now.

4/5 Until now, I have been using IMAP+SMTP, and TbSync for address books and calendars. After going through a few iterations, I have now settled on using Exchange (native, experimental) accounts (yes, plural) for email and sticking with TbSync for calendars and address books.

1/5 @padraig @thunderbird Took a little searching but I am working again! Yay. The complexity is that which setup to use with Exchange can be legacy (POP3, IMAP+SMTP, EAS, EWS/OWA) or current Graph API. Thunderbird 140 supports all of the legacy API but not yet Graph API.

3/5 Right now, Exchange requires add-ons to work. Usually this means TbSync or OWL. Each of these has its own set of features and limitations to consider. Account Hub will show you Exchange in two flavors… one says “add-on required” and the other doesn’t. It’s the latter one that is the native integration in experimental form at this time (and does email ONLY for now).

@hanscees oh, me too. I have a PhD in CS. My mate hosts my e-mail, which I access via #IMAP. Trying to host calendars and contacts there would be another option.

#Apple #Mail is somehow currently also fucking up… deleting messages on one device isn't reflected on others until you quit Mail.