In the Bluetooth method, you can enroll your smartphone or a mobile device. For example, Bob wants to be authenticated through the Bluetooth method. He enrolls the Bluetooth method on the Advanced Authentication Self-Service portal. He can get authenticated with the Bluetooth method only when his smartphone is in the range.
By default, the Enable reaction on device removal option is enabled. When this option is enabled and a user logs in to Windows using Bluetooth, Windows gets locked automatically or performs an action defined in Interactive logon: Smart card removal behavior policy in the following scenarios:
When the Bluetooth device is disabled
When the Bluetooth device is out of range
NOTE:It is recommended to combine the Bluetooth method with another authentication method in a chain to enhance the security.