Windows Hello and Companion Device Framework
Windows Hello works with the Companion Device Framework to enhance the user authentication experience. Using the Windows Hello companion device framework, a companion device can provide a rich experience for Windows Hello even when biometrics are not available (e.g., if the Windows 10 desktop lacks a camera for face authentication or fingerprint reader device, for example).
Note The Windows Hello companion device framework is a specialized feature not available to all app developers. To use this framework, your app must be specifically provisioned by Microsoft and list the restricted secondaryAuthenticationFactor capability in its manifest. To obtain approval, contact email@example.com.