Surface Pro 3 Sign-In Hello it's not available on Win10

Hi there

On my Surface Pro 3 the sign-in option "Hello" it's not available, the camera for app is allowed and it works.  It's really not available?

SKU: Surface Pro 3 i5 (EU)
Version Information
    Embedded controller: 38.14.80.0
    System aggregator: 3.9.850.0
    UEFI: 3.11.2550.0

Thank you in advance for your reply,

Cheers, Francesco