Hello @Ed7
You can find general planning and preparation information and steps here: https://learn.microsoft.com/en-us/windows/security/information-protection/bitlocker/prepare-your-organization-for-bitlocker-planning-and-policies
Here more information about Domain Join Devices and Azure AD: https://learn.microsoft.com/en-us/windows/security/information-protection/bitlocker/bitlocker-management-for-enterprises#managing-devices-joined-to-azure-active-directory
Hope this helps with your query,
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