You may be prompted with the 2 factor authentication screen which will show a QR code for you to scan.
2 factor authentication is an additional layer of security to keep your account safe. Using 2 factor authentication requires a mobile phone with an authentication app provided by either Microsoft or Google. You can find these apps on the Android/Apple app stores and are free to download.
Once you have installed the authenticator app you will have the ability to add an account. Adding an account will trigger the camera of your phone, likely with a square on screen. Line up the square on your camera with the QR code
This will link your account to the app and provide you with a 6 digit code that changes every 30 seconds, enter this code to login.
Each time you login you will need to enter this code.
For more information on the Microsoft 2FA app Click here
Or the link to the google authenticator app Click here