Set up O365 for multi-factor authentication
Microsoft 365 admin Office for business
Once your admin enables your account, for multi-factor authentication (MFA) you have to set up your user account to use it. This should only take a minute or so.
By setting up MFA, you add an extra layer of security to your Microsoft 365 account sign-in.
- To begin use this link to sign into Microsoft 365 with your work account & password. After you choose Sign in, you'll be prompted for more information.
- Choose Next.
- The default authentication method is to use the free Microsoft Authenticator app. If you have it installed on your mobile device, select Next and follow the prompts to add this account. If you don't have it installed there is a link provided to download it.
If you would rather use SMS messages sent to your phone instead, select I want to set up a different method. Microsoft 365 will ask for your mobile number, then send you an SMS message containing a 6-digit code to verify your device.
- Once you complete the instructions to specify your additional verification method, the next time you sign in to Microsoft 365, you'll be prompted to provide the additional verification information or action.
Note: Generally, you'll only need the additional verification method the first time you sign into a new app or device, or after you've changed your password. organization requires it.