Multi-Factor Authentication (MFA)

Multi-Factor Authentication (MFA) is one of the most effective ways to protect your Microsoft 365 account and business data from unauthorised access. With MFA enabled, even if someone has your password, they won’t be able to log in without a second layer of verification.

What is MFA?

MFA requires two things to access your account:

1. Something you know – like your Microsoft 365 password

2. Something you have – like a mobile phone or authentication app

This means that even if your password is compromised, your account remains secure.

How MFA Works

When you sign in to Microsoft 365:

• You enter your email address and password

• You are then prompted to approve a login request using the Microsoft Authenticator app on your mobile device

• Once approved, you’re logged in securely

This extra step adds powerful protection against phishing, credential theft, and unauthorised logins.

Why MFA is Important

• Stops 99.9% of account breaches, according to Microsoft

• Prevents hackers from accessing your account, even if they have your password

• Helps protect your emails, documents, Teams chats, and business systems

• Supports cyber insurance and compliance requirements

How to Set Up MFA

If you’re a new user, you’ll be prompted to set up MFA when you first log in to Microsoft 365.
You can also follow the full guide here:
Accessing MFA Setup

You'll need to:

1. Download the Microsoft Authenticator app

2. Sign in using your Microsoft 365 email address

3. Scan the QR code during setup

4. Approve the test notification

5. You’re done — MFA is now active on your account

We only allow authentication through the Microsoft Authenticator app for maximum security.

Troubleshooting MFA Issues

• Not receiving prompts? Restart your phone and ensure notifications are enabled for the app

• Changed phones? Contact our team so we can reset your MFA setup

• Lost access? We can verify your identity and help you regain access quickly

Need Help?
If you need help setting up or using MFA, get in touch and we’ll walk you through it.

Ticket Portal: https://support.fusionit.uk
Email: support@fusionit.uk
Phone: 01244 835080

Disclaimer:
This article is intended as a general guide. While we aim to ensure accuracy, Fusion IT cannot be held responsible for any issues, data loss, or damage resulting from the use or misapplication of these instructions. If in doubt, please contact our support team before making changes.