How do I remove an old device from Microsoft Authenticator?
To remove the app from a device using a personal Microsoft account, go to the two-step verification area of your Account Security page and choose to turn off verification for your old device.
- From the How would you like to respond? section of the Additional security verification page, select Set up Authenticator app.
- Follow the on-screen instructions, including using your mobile device to scan the QR code, and then select Next. ...
- Select Save.
- On your device or online, go to your Google Account.
- At the top left, in the navigation panel, select Security.
- Under "Signing in to Google," tap 2-Step Verification. ...
- Under "Available second steps," find "Authenticator app" and tap Change Phone.
Since you lost your device with the Authenticator App, you can try unregistering your old device, or if you have other admins within your tenant, you can have them require you to re-register for MFA, to see if that resolves your issue.
- Install Authenticator on your new phone.
- On your computer, visit Google's two-step verification site and log in to your Google account. ...
- Click Change Phone in the Authenticator app section. ...
- Open the Authenticator app on your new phone and tap Begin > Scan barcode.
Go to the security verification settings screen. For information on how to get to this screen, see Changing your security settings. Check the box next to Authenticator app then select Configure. This brings up a screen with a QR code on it.
If you didn't save your backup codes, and you've lost the phone that you use for 2FA – try calling your phone network to transfer your old number over to a new phone. You'll need a new SIM card for that, and it could take a day or two for it to activate.
- Install the Google Authenticator on your new device. ...
- On your old phone, open the Authenticator app.
- Tap on the three dots in the upper right-hand corner of the screen.
- Tap on Transfer Accounts.
- Tap on Export Accounts.
- Verify your identity.
Despite what ShishiXu says, it is absolutely possible to have an authenticator on each of your devices. To do this, set it up on one device and when the QR code is displayed, scan it on the second device as well. Verify that both apps generate the same code.
- Go to your personal Microsoft account sign-in page, and then instead of typing your password, select the Use the Microsoft Authenticator app instead link.
- Microsoft sends a notification to your phone.
- Approve the notification.
How do I reset the QR code on my Microsoft Authenticator?
In the Accounts screen of the Authenticator app, tap the account you want to recover to open the full screen view of the account. In the full screen view, tap the option to scan a QR code to fully recover.
- Open the Microsoft Authenticator app on your phone.
- Tap the + > Work or school account.
- Use your phone to scan the QR square that is on your computer screen. Notes: ...
- Your account will be added automatically to the app and will display a six-digit code.
- Sign in to your work or school account and then go to your My Account portal.
- Select Security info in the left menu or by using the link in the Security info pane. ...
- On the Add a method page, select Authenticator app from the list, and then select Add.
Despite what ShishiXu says, it is absolutely possible to have an authenticator on each of your devices. To do this, set it up on one device and when the QR code is displayed, scan it on the second device as well. Verify that both apps generate the same code.
Go to the security verification settings screen. For information on how to get to this screen, see Changing your security settings. Check the box next to Authenticator app then select Configure. This brings up a screen with a QR code on it.
- Go to your personal Microsoft account sign-in page, and then instead of typing your password, select the Use the Microsoft Authenticator app instead link.
- Microsoft sends a notification to your phone.
- Approve the notification.
In the Accounts screen of the Authenticator app, tap the account you want to recover to open the full screen view of the account. In the full screen view, tap the option to scan a QR code to fully recover.
To turn two-step verification on or off: Go to Security settings and sign in with your Microsoft account. Under the Two-step verification section, choose Set up two-step verification to turn it on, or choose Turn off two-step verification to turn it off. Follow the instructions.
If you didn't save your backup codes, and you've lost the phone that you use for 2FA – try calling your phone network to transfer your old number over to a new phone. You'll need a new SIM card for that, and it could take a day or two for it to activate.
