Setting up Microsoft 365 MFA

Multi-factor authentication (MFA) adds a second check when you sign in to Microsoft 365. As well as your password, you approve the sign-in on your phone using the Microsoft Authenticator app. It takes about 5 minutes to set up.

Before you start

• Your smartphone (iPhone or Android)
• A computer to sign in on
• Your Microsoft 365 email address and password

Step 1: Install Microsoft Authenticator on your phone

• iPhone: Microsoft Authenticator on the App Store
• Android: Microsoft Authenticator on Google Play

Open the app once installed and allow notifications when asked. You'll need these to approve sign-ins.

Step 2: Sign in on your computer

1. Go to office.com and sign in with your work email and password.
2. You'll see More information required. Click Next.
3. On Start by getting the app, click Next, then Next again.
4. A QR code will appear. Leave this screen open.

Step 3: Scan the QR code with your phone

1. In the Authenticator app, tap + (or Add account).
2. Choose Work or school account, then Scan QR code.
3. Point your camera at the QR code on your computer screen.
4. Your account will appear in the app. On your computer, click Next.

Step 4: Approve the test sign-in

1. Your computer will show a two-digit number.
2. Your phone will get a notification. Open it and type in the number shown on your computer.
3. Tap Yes to approve.
4. On your computer you'll see Notification approved. Click Next, then Done.

That's it. From now on, when you sign in you'll be asked to approve it on your phone.

Staying safe

• Only approve sign-ins you started. If you get a request you weren't expecting, tap No, it's not me and contact us straight away.
• Never read your sign-in number out to anyone, including someone who says they're from IT.
• Getting a new phone? Don't delete the app from your old one until you've moved your account over.

Something not working?

• No QR code or "More information required" screen? MFA may already be set up on your account, or not switched on yet. Contact us and we'll check.
• Not getting notifications? Check notifications are allowed for Authenticator in your phone's settings, and that your phone has signal or Wi-Fi.
• Lost or replaced your phone? Contact us and we'll reset your MFA so you can set it up again.

Still stuck? Raise a support ticket and we'll help.