How do I use Active Directory for backup of BitLocker Drive Encryption recovery information?

BitLocker recovery information is stored in a child object of a computer object in Active Directory. That is, the computer object is the container for the BitLocker recovery object.

More than one BitLocker recovery object can exist for each computer object, because there can be more than one recovery password associated with a BitLocker-enabled volume.

Each BitLocker recovery object on a BitLocker-enabled volume has a unique name and contains a globally unique identifier (GUID) for the recovery password.

The name of the BitLocker recovery object is limited to 64 characters because of Active Directory constraints. This name incorporates the recovery password GUID as well as date and time information. The form is:

<Object Creation Date and Time><Recovery Password GUID>

For example:

2005-09-30T17:08:23-08:00{063EA4E1-220C-4293-BA01-4754620A96E7}

The Active Directory common name (cn) for the BitLocker recovery object is ms-FVE-RecoveryInformation and includes attributes such as ms-FVE-RecoveryPassword and ms-FVE-RecoveryGuid.

There is only one TPM owner password per computer; therefore the hash of the TPM owner password is stored as an attribute of the computer object in Active Directory. It is stored in Unicode. The attribute has the common name (cn) of ms-TPM-OwnerInformation.

In order to store BitLocker and TPM information in Active Directory, all domain controllers must run Windows Server 2003 with Service Pack 1 or later. Schema extensions will also need to be installed on servers running Windows Server 2003.