If you use this option, you will have to provide a 6-digits code or press the “approve” button to access your account. This 6-digits have a life-span of 30 seconds.
Setup
If it’s the first time you activate the MFA, go directly to “Scan the QR code” as the steps below are a guide to change the sign-in method.
Go to your security info page: https://mysignins.microsoft.com/security-info
Click on “add method”.
Select "Authenticator app" and click on “ADD”
Install first the application on your smartphone.
Authenticator for android or go to the Google Play Store
Authenticator for Apple from the App Store
When the installation is done (step 1), launch the Authenticator app and select the “next” button
On the PC, some information is provided on how to use the app. Click “next”
Scan the QR code
A QR code is shown on the screen
Use your smartphone to scan the QR code. Most smartphones have the ability to scan QR codes by using the camera. Focus on the QR code and it should display a link.
Launch the Authenticator app, Click on the 3 dots and select “add an account”. in the type of account, select “work account” And Scan the QR code
The app give you a code.
Go back to the computer
Select “next”
Open the notification and click on “approve “ on your smartphone. Or type the 6 digits code provided by your smartphone on your computer
Click on “next” on your computer.
it’s done
Each time you access from a new computer or when prompted, open your app and provide the 6 digits code