So I'm in charge of all-things Office 365 related at my office. We enabled 2FA authentication for Office 365 and it's working fine for the majority of our users (specifically Outlook). Then add their Outlook account, it asks for the password and it's done. But for a couple of users, it's not working. When Outlook asks for he/she's password, it never accepts it. It just asks for the password again and again. I'm not sure what I should do here. Any suggestions?