Click this link:
Click Activate Mobile app.
Click the "Generate Activation Code button".
On your phone, install Microsoft Authenticator, open Authenticator, tap add account, tap allow camera access.
Scan the qr code on your computer screen.
After your phone refreshes click complete activation on your computer screen.
Ensure the screen has the name of your phone listed as a device.
In the Authenticator app on your device, tap the menu button in the top left (iPhone) or top right (Android)
Scroll down to App Lock and turn it off (if it is already off turn it on and back off or it will turn on in the future).
NOTE: By turning this off you will be able to utilize other smart devices to approve your login. If you leave it on you will be required to put in your phone lock code every time you need to approve the login.