With the push to disable "legacy" protocols completely in a lot of environments, even with XOAUTH2 support and the external script for oauth, it's not really possible to use Mutt.
There still hasn't been anything in terms of adding mapi support as well, right? https://gitlab.com/muttmua/mutt/-/wikis/MailboxDriverCleanup https://github.com/openchange/openchange still exists, though looks like it hasn't been touched since 2015, and the website is dead. w