Microsoft Authenticator app is now available for download from Windows Store for Windows 10 Mobile devices. Soon, this app will have a cool feature that you can use to unlock your Windows 10 computer over Bluetooth without entering the password. Just open the app and tap on a nearby computer. For now, this app can be used for 2-factor authentication alone.
This app is still in beta, so it has its limitations.
This app is still in beta. Future versions will include support for Microsoft account, a sign-in solution for browsers and VPN, one-time passcode generation, and MFA approval through notifications.