davmail is your answer. I use it to access work M365 and Seneca College M365, which both require multi factor authentication. On my ubuntu desktop/laptop I install the packages davmail and openjfx, and my ~/.davmail.properties includes (among others) davmail.mode=O365Interactive davmail.url=https://outlook.office365.com/EWS/Exchange.asmx at startup/login I run ( davmail -server > /dev/null 2>&1 & ) and my .muttrc has things like set imap_user="jsellens@example.com" set spoolfile=imap://localhost:1143/INBOX set smtp_url = "smtp://jsellens@example.com@localhost:1025/" set smtp_authenticators = "login" set ssl_force_tls = no Start up mutt, get prompted for password, get popup window asking for two factor (e.g. google authenticator, or duo push), comply, and there's my mail. And davmail is willing to cache credentials, so I don't always have to two factor. Note that this does not require IMAP access to M365 - it uses the "normal" exchange protocols, just like Outlook would. Feel free to let me know if you run into problems, and I'll try to help. Hope that's helpful! John On Thu, 2023/04/06 10:51:34AM -0400, Peter King via talk <talk@gtalug.org> wrote: | I desperately miss mutt. But the University of Toronto, in its | administrative wisdom, moved us all to Microsoft365 which insists on token | security of a kind mutt doesn't implement. If I ever leave or find a way to | implement it, I'm back to using mutt like a shot.