Well, there is Owl [1], which I have mentioned before. Of course, it is the old "chase the rabbit" game we know since the 2000s -- MS365 is just a faster movin

Well, there is Owl [1], which I have mentioned before. Of course, it is the old "chase the rabbit" game we know since the 2000s -- MS365 is just a faster moving target than Exchange on MS Windows Server. So far the devs have kept up well, I can count the instances I had to fall back to OWA on one hand over the last year. And I use it daily within my company. [1] https://addons.thunderbird.net/en/thunderbird/addon/owl-for-exchange/ https://addons.thunderbird.net/en/thunderbird/addon/owl-for-...