Password or -pw Adds a password key protector for the volume. Optional. You will be prompted for a password to turn on BitLocker ...

-Password or -pw
                Adds a password key protector for the volume. Optional. You
                will be prompted for a password to turn on BitLocker on the
                device.
    -ADAccountOrGroup or -sid
                Adds a SID-based Identity protector for the volume. The volume
                will automatically unlock if the user or computer has the
                proper credentials. When specifying a computer account, append
                a '$' to the computer name and specify -service to indicate
                that the unlock should happen in the context of the BitLocker
                service (instead of the user).
    -UsedSpaceOnly or -used
                Sets the encryption mode to used space only encryption. The
                sections of the volume containing used space will be encrypted,
                but the free space will not. If not specified, all used space
                and free space on the volume will be encrypted.
    -EncryptionMethod or -em
                Configures the encryption algorithm and key size used for an
                unencrypted volume. Choose between AES 128 bit ("aes128"),
                or AES 256 bit ("aes256"). Unless otherwise specified,
                AES 128 bit is used to encrypt the disk.
    -SkipHardwareTest or -s
                Begins encryption without a hardware test. Optional. If not
                specified, you must restart and pass a hardware test before
                encryption will begin on the OS volume. The test checks
                whether the TPM works as expected and whether the computer can
                read an external key file from a USB drive during boot.
    -Synchronous or -sync
                Forces manage-bde to wait until the -on command has finished
                before displaying the command prompt. This switch only applies
                when turning on BitLocker.
    -DiscoveryVolumeType or -dv
                Define the file system to use for the discovery volume.
                A native BitLocker volume ("[none]") is not recognized by
                earlier versions of Windows; the data is not accessible and
                the OS might offer to format the drive.
                The discovery volume is an overlay that is recognized by
                earlier versions of Windows. It also provides an application
                to provide access to the encrypted data.
                If this parameter is not specified or "[default]" a FAT32
                discovery volume is used if the volume contains a FAT
                file system.
    -ForceEncryptionType or -fet
                Forces BitLocker to use either software or hardware encryption.
                If the "hardware" parameter is selected, but the drive does
                not support hardware encryption, manage-bde returns an error.
                If group policy forbids the selected parameter, manage-bde
                returns an error.
    -RemoveVolumeShadowCopies or -rvsc
                Forces deletion of Volume Shadow Copies for the volume.
                You will not be able to restore this volume using
                previous system restore points afterwards.
    -ComputerName or -cn
                Runs on another computer. Examples: "ComputerX", "127.0.0.1"
    -? or /?    Displays brief help. Example: "-ParameterSet -?"
    -Help or -h Displays complete help. Example: "-ParameterSet -h"

Examples:
    manage-bde -on C: -RecoveryPassword
    manage-bde -on C: -RecoveryKey e:\ -RecoveryPassword
    manage-bde -on C: -rp -rk "f:\Folder" -SkipHardwareTest
    manage-bde -on C: -rp -StartupKey "f:\\"
    manage-bde -on C: -rp -TPMAndPIN -em aes128
    manage-bde -on E: -rp -Certificate -cf "C:\File Folder\Filename.cer"
    manage-bde -on E: -pw
    manage-bde -on E: -UsedSpaceOnly
    manage-bde -on E: -sid Domain\User
    manage-bde -on E: -sid Domain\Machine$ -service