The PowerShell command to import BitLocker data into Azure. After you run this command on a client machine—if the machine has been joined to AAD and BitLocker is enabled—the BitLocker data will appear under the device properties in Azure:
$BITLOCKER = Get-BitLockerVolume -MountPoint "C:" | select * BackupToAAD-BitLockerKeyProtector -MountPoint "C:" -KeyProtectorId $BITLOCKER.KeyProtector[1].KeyProtectorId