Check-out the following links:
Additional information regarding Domain Join Devices and Azure Active Directory may be found here: https://learn.microsoft.com/en-us/windows/security/information-protection/bitlocker/bitlocker-management-for-enterprises#managing-devices-joined-to-azure-active-directory
https://learn.microsoft.com/en-us/windows/security/information-protection/bitlocker/prepare-your-organization-for-bitlocker-planning-and-policies.
Regards,