Turn on two-factor authentication for Microsoft 365
If your business email runs on Microsoft 365, this is the single most important account to protect. Setup takes a few minutes and you do it once per device.
- Install Microsoft Authenticator from the App Store or Google Play on your phone first.
- On a computer, go to office.com → sign in → click your initials or photo top right → View account.
- Open Security info → Add sign-in method → Authenticator app.
- Follow the prompts on screen and scan the QR code with the Authenticator app when asked.
- Approve the test prompt that appears, then add a backup method such as your mobile number in case you lose the app.
- If your organisation enforces MFA centrally, you may be prompted to do this automatically at your next sign-in — follow the same steps.
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