The Microsoft Authenticator app helps prevent unauthorized access to your email account. Every time you log in to your account, the app confirms your identity and ensures your essential information is protected. Add the Authenticator app on up to 5 devices.
Download and install the application
Install the latest version of the Authenticator app, based on your Smartphone operating system:
Google Android. On your Android, go to Google Play to download and install the Authenticator app.
Apple iOS. On your Apple iOS device, go to the App Store to download and install the Authenticator app.
Important: If you're not currently on your mobile device, you can still get the Authenticator app if you send a download link from the Authenticator app page.
Step 1: Add the Authenticator app
First, add the Authenticator app as a login method to your account. You need your computer and your mobile device with the Authenticator app installed.
1. On your computer, go to the security information page
If you are unable to sign in, select Next . Then proceed to the next step.
- If you can log in, select Add method. Select the Authenticator app from the list, then select Add.
- Under Get started by getting the app , select Next . You must have the app already installed on your phone.
On your mobile device, open the Authenticator app. If prompted, allow notifications.
Tap + , then Work or school account, then Scan QR code.
If this is your first time using the app, you can select Add Account.
On your computer, under Set up your account , select Next .
Use your mobile device's camera to scan the QR code shown on your computer.
On your computer, under Scan QR Code , select Next .
On your mobile device, the app will ask you to approve the login. After the notification is approved, select Next on your computer.
Step 2: Add a phone number
If not already added, you may need to enter your phone number as a login method.
On your computer, enter a phone number, select Send me a code message or Call me, and select Next .
Enter the code and select Next.
After verifying your phone, select Next.
You will see a success message. Select Done. You will also see Microsoft Authenticator on the Security info page. In the app, your email account will appear under Authenticator .
Now, whenever you log into your account, you confirm your identity with the app.
More Informations: https://support.microsoft.com/en-us/account-billing/baixar-e-instalar-o-microsoft-authenticator-aplicativo-351498fc-850a-45da-b7b6-27e523b8702a