MFA - AKA multi-factor authentication - helps to secure your Microsoft account by using an authentication method in addition to your password, so that hackers trying to access your account are faced with a much greater challenge than if they had only your password.
Once activated by your system administrator, it's easy to setup.
Download the app
On your App Store (Apple or Android), download the Microsoft Authenticator app, and keep it handy for the next step.
Log into the MS Portal
- Open a web browser on your computer and log into the Microsoft portal - https://portal.office.com/
- Enter your email address and password, as normal
- The More information required window appears
- The Additional security verification window appears
- Step 1. How should we contact you? select Mobile app verification (it doesn't rely on your mobile number)
- Select how you'd like to use the verification app
- Receive notifications - this option is more convenient
- Use verification code - this option is more secure
- Click Setup
- The Configure mobile app window appears
- Open the Authenticator app on your phone
- You may have to agree to various terms before continuing
- Select Scan QR code
- Add your account
- If you don't have existing accounts then click on Scan QR code
- If you have existing accounts, then click the + sign on the top-right of the app
- Scan the QR code shown on the browser
- Once the scan is done press Next
- You'll receive an approval request, as a test
- Additional steps
- You may be required to enter a security code from your account on the Authenticator app
- You may need to add your mobile phone number as a fallback
- If asked, save the presented app password
- Once successful, you'll be asked to confirm any login attempts to your Microsoft account
IMPORTANT: You'll be asked to re-enter your password on your various devices, and as part of this MFA authentication will be required.