manage-bde -unlock Volume {[{-RecoveryPassword| -rp} NumericalPassword | {-RecoveryKey|-rk} PathToExternalKeyFile]} {-Certificate|-cert} ...

manage-bde -unlock Volume
                    {[{-RecoveryPassword| -rp} NumericalPassword] |
                    [{-RecoveryKey|-rk} PathToExternalKeyFile]}
                    [{-Certificate|-cert} {-cf PathToCertificateFile|
                                           -ct CertificateThumbprint} {-pin}]
                    [{-Password|-pw}]
                    [{-ComputerName|-cn} ComputerName]
                    [{-?|/?}] [{-Help|-h}]

Description:
    Allows access to BitLocker-encrypted data with a recovery password,
    recovery key, certificate, or password.

Parameter List:
    Volume      Required. A drive letter followed by a colon. Example: "C:"
    -RecoveryPassword or -rp
                Provide a recovery password to unlock the volume. You must have
                previously created a Numerical Password protector for the
                encrypted volume.
    -RecoveryKey or -rk
                Provide an external key file to unlock the volume. Required if
                -RecoveryPassword is not provided. You must have previously
                created an External Key protector for the encrypted volume.
    -Certificate or -cert
                The user's certificate store is queried for a certificate with
                an identical thumbprint as the one used to encrypt the volume.
                If a certificate is found, the private key is retrieved and
                used to unlock the volume. Specify either the certificate file
                or the certificate thumbprint of the certificate. If a PIN is
                required to access the certificate (such as for a smart card),
                specify the "-pin" parameter and you will be prompted to enter
                the PIN.
    -Password or -pw
                Prompts for a password to unlock the volume.
    -ComputerName or -cn
                Runs on another computer. Examples: "ComputerX", "127.0.0.1".
                Cannot be used in conjunction with -Certificate.
    -? or /?    Displays brief help. Example: "-ParameterSet -?"
    -Help or -h Displays complete help. Example: "-ParameterSet -h"

Examples:
    manage-bde -unlock -?
    manage-bde -unlock e: -RecoveryPassword ...
    manage-bde -unlock e: -RecoveryKey "f:\File Folder\Filename"
    manage-bde -unlock e: -Certificate -cf "C:\File Folder\Filename.cer"
    manage-bde -unlock e: -pw