Microsoft has announced that it will be rolling out its Microsoft Authenticator app for the Apple Watch, citing high customer demand for having the second factor authentication tool available on their wrists. The app is already available as a public preview via TestFlight, and will allow users of Microsoft personal, work, and school accounts to approve sign-ins that require PIN or biometric authentication without having to pull our their iPhone. All supported accounts will automatically sync to the Apple Watch, and the feature will be included in the next major release of Microsoft Authenticator.