MFA for Microsoft 365 – A Complete Guide for Students

This guide provides step-by-step instructions on how to set up multi-factor authentication (MFA) for your Microsoft 365 account. It is intended for end users and includes all the necessary steps as well as important tips for everyday use.

1. What is MFA and why is it important?

Multifactor authentication (MFA) is an additional security measure for your user account. In addition to your password, a second factor is required—usually a code or a confirmation via your smartphone.

  • It protects your account even if your password has been compromised.

  • It’s a security standard for Microsoft 365.

  • It enhances security without requiring any significant extra effort.

2. Supported Authenticator Apps

Several authenticator apps are available for Microsoft 365. You can also set up multiple apps at the same time.

  • Microsoft Authenticator: Recommended default app with push notifications and security codes (TOTP).

  • Google Authenticator: Classic authenticator app with time-based security codes (TOTP).

  • 2FAS Authenticator: Can be used offline; backup feature available.

3. Requirements

  • PC, laptop, or tablet with internet access

  • Microsoft 365 user account

  • Smartphone (Android or iOS)

  • Authenticator app installed

4. Access security information (PC/laptop)

On your PC, open the following URL: https://mysignins.microsoft.com/security-info

  • Sign in with your Microsoft 365 account.

  • Select "Add a sign-in method."

  • Select "Microsoft Authenticator" or "Set up another authentication app."

5. Setting up Microsoft Authenticator (recommended)

Steps on your PC:

  1. Select Microsoft Authenticator.

  2. Display the QR code.

  3. After scanning, enter the 6-digit code.

Steps on a smartphone:

  1. Install Microsoft Authenticator from the App Store or Play Store.

  2. Open the app and select "Add Account."

  3. Scan the QR code.

6. Setting up Google Authenticator

Steps on a PC:

  1. Select "Set up another authentication app."

  2. Display the QR code.

  3. Enter the 6-digit code.

Steps on a smartphone:

  1. Install Google Authenticator.

  2. Open the app and scan the QR code.

7. Setting up 2FAS Authenticator

Steps on a PC:

  1. Select "Set up another authentication app."

  2. Display the QR code.

  3. Enter the 6-digit code.

Steps on a smartphone:

  1. Install 2FAS Authenticator.

  2. Open the app and scan the QR code.

8. Important Notes & Best Practices

  • Recommendation: Set up at least two MFA methods (primary and backup).

  • Enable the app’s backup features.

  • Check your MFA methods before switching phones.

  • If you lose your smartphone, contact IT support.

9. Common Issues

  • Cannot scan the QR code: Adjust screen size/brightness.

  • Code is rejected: Set your smartphone to automatically sync the time.

  • No longer have access: Contact IT support.