Requirement
Before you can enable Microsoft 365 sign-in 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.
- Select Enable phone sign-in:
Then follow the instructions on your phone to register your device for this service. - Device registration and Set passcode musst be completed. Press Continue
- The next time you log in to Microsoft 365, you will no longer have to enter your OST password, but instead confirm the two-digit code that appears on the browser with your smartphone screen:
Continue to tip 4: Where can I change or add to the security check stored in Office 365?