If you need to set up MFA for Microsoft 365, you’ve come to the right place.

Multifactor authentication (MFA) is a security method that helps protect your online accounts and personal information by adding an extra layer of security on top of your username and password. It’s like having multiple locks on a door to make it more difficult for someone to break in.

A factor in authentication is a way of proving that you are who you say you are when you try to sign in. The three most common kinds of factors for multifactor authentication (MFA) are:

  1. Something you know: Typically, it involves a password, PIN, or answering a security question. It’s the most common factor and is often the first line of defense in MFA.
  2. Something you have: This factor involves possessing a physical item that verifies your identity, like your smartphone, key fob, or secure USB key.
  3. Something you are: This factor utilizes biometric characteristics unique to you as an individual. It can include fingerprints, facial recognition, or iris scans.

Signing into Microsoft 365 for the first time (MFA)

If you are signing into your Microsoft 365 account for the first time, chances are you’ll be prompted to enter additional information before you gain access to your account.

Sign in to your Microsoft 365 account and enter your username and password to access your account.

After you choose Sign in, you’ll be prompted for more information. Choose Next.

The default authentication method is the free Microsoft Authenticator app. If you already have it installed on your mobile device, select Next and follow the prompts to add this account. If you don’t have it installed, here are the links to download the app:

Instructions on How to Setup Microsoft Authenticator App Authentication

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.