This article doesn't detail how to configure AD DS to store the BitLocker recovery information.
This article assumes that it's understood how to set up AD DS to back up BitLocker recovery information automatically, and what types of recovery information are saved to AD DS.
It's recommended to create a recovery model for BitLocker while planning for BitLocker deployment. Organizations can use BitLocker recovery information saved in Active Directory Domain Services (AD DS) to access BitLocker-protected data. This article describes how to recover BitLocker keys from AD DS.