1. Download the Microsoft Authenticator app from Apple/Google app store (ensure its the correct one – the app is free and will never ask you to pay – links can be found at the end of this article):

2. Open Microsoft Authenticator and click the ‘+’ to add a new account.

3. Choose ‘Work or school account’ from the list of options:

4. In a web browser, go to https://aka.ms/MFASetup and sign in with your Office 365 account.
5. Click ‘Next’ on the below screen.

6. Click ‘Next’ and follow the on-screen instructions, until it proves a QR code to scan.
7. Choose ‘Scan QR code’:

8. Scan the QR code displayed on your computer/laptop screen and press ‘Next’:

9. After scanning the code, you will be prompted to approve the sign in on the app. Select Approve.
You will see a confirmation message on your computer/laptop that the sign in has been approved. Click Next.

10. The Microsoft Authenticator will now be setup and ready for you to retrieve ‘One-time password codes’ that expire every 30 seconds:

Google Play link: https://play.google.com/store/apps/details?id=com.azure.authenticator&pcampaignid=web_share
Apple Store link: https://apps.apple.com/gb/app/microsoft-authenticator/id983156458