HOTSPOT
Your network contains an Active Directory domain named contoso.com. The domain contains a server named
Server1 that runs Windows Server 2012 R2.
Server1 has the following BitLocker Drive Encryption (BitLocker) settings:
You need to ensure that drive D will unlock automatically when Server1 restarts. What command should you run?
To answer, select the appropriate options in the answer area.
Answer: 
add-BitlockerKeyProtector -MountPoint D: -AdAccountOrGroupProtector Contoso\Server -Service
the “-Service” part unlocks the volume
https://technet.microsoft.com/en-us/library/jj649835(v=wps.630).aspx