Office 365 Multi-Factor by SMS
If you want to set up multi-factor authentication for Office 365, but cannot (or do not want to) install the mobile app, there is a special process to follow.
Follow the steps detailed below:






After following this process, you must close the login screen/tab, and log in again to Office 365. This is to end the process "early" before installing the mobile app for authentication.
When you next log in, you will be prompted to authenticate by entering in a verification code sent to your mobile device.