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What Is Multi‑Factor Authentication (MFA)?

Multi‑Factor Authentication (MFA) is an additional security measure that requires users to verify their identity using more than one factor when signing in. Instead of relying only on a password, MFA adds an extra step that helps protect your account and data from unauthorised access.

How MFA Works

When MFA is enabled, signing in becomes a two‑step process:

  1. You enter your usual sign‑in details (such as email and password)
  2. You provide a one‑time verification code from an authenticator app

This additional check significantly reduces the risk of account compromise, even if a password is leaked or guessed.

Why MFA Is Important

Passwords alone are no longer enough to protect sensitive information. MFA helps by:

  • Preventing access if a password is stolen
  • Reducing the impact of phishing attacks
  • Protecting your data even if credentials are compromised

By requiring something you have (your authentication device), MFA adds a powerful extra layer of security.

Why Authenticator Apps Are the Most Secure Option

There are several ways MFA can be implemented, but authenticator apps are considered the most secure and reliable option.

Authenticator apps:

  • Generate codes directly on your device
  • Do not rely on SMS or email delivery
  • Produce short‑lived codes that can’t be reused
  • Often require an additional unlock method (PIN, password, or biometrics)

Because authenticator apps work locally on your device, they greatly reduce the risk of interception or delay.

Recommended Authenticator App

There are many authenticator apps available. We recommend:

Microsoft Authenticator

It is easy to set up, widely supported, and offers additional security features such as biometric protection

Do I Need an Authenticator App?

Yes. If MFA is enabled on your account, an authenticator app is required.

Without one:

  • MFA cannot be completed
  • You will be unable to sign in

Most people install an authenticator app on a mobile phone. If this is not possible, other options such as Windows‑based apps or browser extensions may be suitable.

If you are unsure what option is best, please contact your local IT support team.