Active Directory Domain Services (AD DS) can be used to store Trusted Platform Module (TPM) recovery information.

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 AD DS. The attribute has the common name (CN) of ms-TPM-OwnerInformation.

Active Directory requirements

To store TPM information in AD DS, all domain controllers must be running Windows Server 2003 with Service Pack 1 or later. You also need to install schema extensions if all domain controllers are running Windows Server 2003.

Step-by-step instructions

For step-by-step instructions for configuring AD DS and Group Policy to support the storage of recovery and owner information, see BitLocker Drive Encryption Configuration Guide: Backing Up BitLocker and TPM Recovery Information to Active Directory (

Additional references