Requirement
Before you can enable signing in to Office 365 without a password, you must have configured the Microsoft Authenticator app: How do I sign in with my OST account for the first time?
- Open the Microsoft Authenticator app on your smartphone and select your OST account.
- Click the pull-down menu in the top right and select Enable phone sign-in:
Then follow the instructions to register your device for this service - The next time you log into Office 365, you no longer have to enter your OST password, but confirm the two-digit code that is displayed on the screen on your smartphone:
