Review for Owl for Exchange by Dooganar
Rated 5 out of 5 stars
Hesitant to pay directly for an email service cause i am a zoomer and used to internet stuff being free / paid using data economy. I think it is worth it in this case. If you are trying to sign up a microsoft email to thunderbird, and it doesn't work - there is a great chance that Owl will.
I hope that this feature will become free / integrated into an official Thunderbird subscription thing in the future instead of it seeming like a seperate thing (make things more coherent)
To create your own collections, you must have a Mozilla Add-ons account.