Review for Owl for Exchange by Ahnoold
Rated 4 out of 5 stars
This review is for version 0.7.9.2 on Thunderbird 91.4.1. The only add-on I've found that will get Thunderbird connected to my work's Office 365 e-mail. Worth paying for just because of that.
If I were to request any kind of change, I wish there was an option in this add-on to select which services (e-mail, calendar, tasks, etc.) this add-on handled instead of just assuming it should try to connect everything.
To create your own collections, you must have a Mozilla Add-ons account.