You can use the instructions below to enable Office 365 two factor authorization (2FA) and how to use the Microsoft Authenticator App for MFA/2FA.

You will need your:

PasswordLogin password
Computer to access your Office 365 mailbox via a web browser (Chrome, Firefox, Edge)
Mobile phoneTo install the Authenticator app

These instructions take you through the following steps, it is important that all these steps are followed.

Step 1 - Download Microsoft Authenticator app to your mobile device

Step 2 - Access Office 365 user account online at

Step 3 - Configure the Microsoft Authenticator App

Step 4 - Save Microsoft Authenticator App Password

Step 5 - Login to Office 365 account using 2FA

Questions provide additional information and how to sort out things when they go wrong.

Step 1 - Download Microsoft Authenticator app to your mobile device

  1. Navigate to your phones App Store and search for Microsoft Authenticator app. The search results should have found the following app.

    iphone app store
  2. Download the app to your phone.
  3. Once download is complete,  a new icon will have appeared on your phone called Authenticator.

    Authenticator app icon

     You will need this later in step 3.

Step 2 - Access Office 365 user account online

  1. Using your computer, open a browser and navigate to
  2. Log into Office 365 online with your company email address and password.
  3. Your IT Administrator will already have enabled 2FA on your company user account, so you should receive the following prompt asking you to setup 2FA.

  1. Click on Next.
  2. You will then arrive on the page called Additional Security Verification asking you which security method you would like to use.
  3. Select the option Mobile App from the drop down list and select Use verification code from the list of choices, click Set up.
  4. Once this has been completed you will be displayed with the message below.

    configure mobile appThis contains the QR Code (black square) which you will need to scan with the Authenticator app downloaded in Step 1 to setup your account.


Step 3 - Configure the Microsoft Authenticator App

  1. With your mobile phone in hand, open the Microsoft Authenticator app.
  2. Skip any Intro screens the app may present to you until you get to the Ready to add your first account? screen or similar.

    2fa add account

  3. Select Add account or "+" icon in the top right corner of the app screen.
  4. Select the option Work or school account.


  5. You may be asked to allow the app to use your phone’s camera, click OK to allow this.
  6. You will be presented with a screen called Scan QR code with a square camera box in the middle of the screen.

  7. Lift the mobile device so that the QR code on your computer screen sits inside the Scan QR code camera square.
  8. As soon as the Authenticator app has scanned the QR code the following screen will appear on the computer screen. Set up button is greyed out and the Next button is highlighted.

    next steps

    On the Authenticator app on your mobile phone a new account will have been created, displaying a set of 6 digits that updates every 30 seconds. This ever-changing number provides the second authentication factor required for 2FA.

  9. Click Next on your computer screen.
  10. You will then be prompted for the Allow from the Authenticator app.

    enter verification code

Step 4 - IMPORTANT STEP: Save the App Password if you receive this prompt

  1. An Authenticator App password will be presented to you. please make a note of this and keep it safe. Write it down or use the copy tool to the right of the password then paste into notepad, so that you can save it to your machine.  

    Select Finished when you are sure you have a copy of the password stored.

Step 5 - Login to your Office 365 account using 2FA

  1. Open Outlook on your computer and when prompted enter your company email address (username) and click next.

  1. Enter your Windows password (your computer logon password) then click Next.
  2. You will then be prompted to enter the six-digit verification code or prmopted to Allow from the Authenticator app on your phone. Enter the code and your Outlook will run as normal.