Sometimes i need to Find the Bitlocker-Keys for a domaincomputer and then i use the following Script:
$objComputer = Get-ADComputer COMPUTERNAME
$Bitlocker_Object = Get-ADObject -Filter {objectclass -eq 'msFVE-RecoveryInformation'} -SearchBase $objComputer.DistinguishedName -Properties 'msFVE-RecoveryPassword'
$Bitlocker_Object
msFVE-RecoveryPassword contains the password required to recover a Full Volumen Encryption volume.
This has to be run with Admin privilege