You might be right about ActiveSync; perhaps your school is only
supporting that, rather than full Exchange w/Oauth2. As for MM, I think
the OAuth2 option only becomes available after entering the appropriate
server hostnames for IMAP & SMTP (and maybe even hitting "apply").
Also, I think r57
Thanks, Eric. Active Sync is evidently Microsoft's version of IMAP. It has been
around for a while and MS is apparently claiming that Active Sync is more
secure for mobile devices. I tried to set up a new IMAP account with MailMate,
but get no screen showing the option of OAuth2, and I'm quite s