When logging into a service, you will be asked to setup multi-factor authentication on your phone or device.
Step 1: Prompt for More Information
When given this prompt, after going to myaccount.microsoft.com, click Next.
Step 2: Get the Microsoft Authenticator App
A new page will open up that will ask you to download the app to your phone. Click the “Download now” link or use the QR code from below. If you use an Android phone, go to the Google Play store and install the Microsoft Authenticator app. If you use an iPhone, use the Apple store to download the app.
If you are on your mobile device, the screen will look like this:
Step 3: Install the Microsoft Authenticator App
After you have clicked "Download Now," follow the links below, or use the QR codes from below to install the Microsoft Authenticator app.
Android:
https://go.microsoft.com/fwlink/p/?LinkID=2168850&clcid=0x409&culture=en-us&country=US
Apple:
https://go.microsoft.com/fwlink/p/?LinkID=2168643&clcid=0x409&culture=en-us&country=US
Step 4: Click Next
Once the app is installed, click "Next" on your computer or device.
Step 5: Pair Your Account to the App
If you are connecting from your mobile device, you will see a screen like the one below. Tap the link to Pair your account to the app by clicking this link.
If you are setting this up on a computer, the easiest way to pair your device is to scan the QR code with the Authenticator app:
On the Authenticator app, tap the plus button.
Tap, "Work or school account," then "Scan QR code"
Scan the QR Code. Make sure you scan the QR code with the Microsoft Authenticator App, not just using the device's camera app.
Note: Make sure you have allowed the app to access your Camera.
Step 6: Send a Test Notification to the App
Once the device is paired to your account, click next to send a test notification to the Microsoft Authenticator app.
Step 7: Approve the Test Notification in the App
Approve the authentication prompt on your Microsoft Authenticator app by entering the two-digit number shown to sign in.
Step 8: Finish the Setup
Click Done. Your Microsoft Authenticator app is now set up and ready to use to authenticate your logins.