I have a business account with office 365 and two factors authentication.
Since the last beta 10.14.4 (18E184e), During the account validation, (every 30-days), we have two re-enter the password, and normally the two-factors authentication page is started. But in this case this page is never displayed.
I tried to do the same thing with Safari (outlook.office365.com) without success.On Chrome or Firefox it works correctly.
I have the same issue on iOS beta.
I opened a bug #5253342
