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How to setup MFA (Multi Factor Authentication) and the Microsoft Authenticator App on your MS 365 Account
Once your administrator has enabled MFA on your account, the easiest way to login is by using the Microsoft Authenticator app. By setting up MFA, you add an extra layer of security to your Microsoft 365 account sign-in. For example, you first specify your password and, when prompted, you also type a dynamically generated verification code provided by an authenticator app or allow the sign in via a prompt on your phone.
First download the app for your device from the link below:

https://www.microsoft.com/en-us/account/authenticator

1.┬áSign into Microsoft 365 with your work or school account with your password like you normally do. If this if the first time you have signed in, you’ll be prompted for more information.
2. Choose Next.

3. 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.

4. 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, such as typing the verification code provided by your authenticator app or sent to you by text message.

setup the Microsoft Authenticator app once logged into your account

1. Sign into your work or school account and then go to https://myaccount.microsoft.com
2. Select Security info from the left navigation pane or from the link in the Security info block Highlighted Above), and then select Add method from the Security info page. (Below)
3. On the Add a method page, select Authenticator app from the drop-down list, and then select Add.
4. If you already have the app downloaded select Next, otherwise download and install from the link.

5. Remain on the Set up your account page while you set up and open the Microsoft Authenticator app on your mobile device.

6. Open the Microsoft Authenticator app, select to allow notifications (if prompted), select Add account from the Customize and control icon on the upper-right, and then select Work or school account.

7. Return to the Set up your account page on your computer, and then select Next.

The Scan the QR code page appears.

8. Scan the provided code with the Microsoft Authenticator app QR code reader, which appeared on your mobile device after you created your work or school account in Step 6.

The authenticator app should successfully add your work or school account without requiring any additional information from you. However, if the QR code reader can’t read the code, you can select the Can’t scan the QR code link and manually enter the code and URL into the Microsoft Authenticator app.

9. Select Next on the Scan the QR code page on your computer.

A notification is sent to the Microsoft Authenticator app on your mobile device, to test your account.

10. Approve the notification in the Microsoft Authenticator app, and then select Next.

We hope you found this guide useful, if you’d like assistance with security or any other aspects of your Microsoft 365 environment then please get in touch, the team would be happy to discuss our solutions with you.

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