What I'm most curious about, and what the docs are light on detail about: does this mean Thunderbird complies with remote deletion requests (which IIRC, the Exchange protocol suppports)? I have the impression that Microsoft makes this a requirement for Exchange implementations, which is why third-party devices and apps like Apple's Mail cooperate with those requests.
Do you mean recall? https://support.microsoft.com/en-us/office/recall-an-outlook... That only works within an organisation, right? Otherwise you just get an email. I got one recently.
If your Outlook server disables IMAP & POP3, then the ActiveSync protocol is AFAIK the only way to get in-app emails on your phone. Admins do this so that they can forcibly wipe the device if they "need" to.
0: https://learn.microsoft.com/en-us/exchange/clients/exchange-...