Hi,
As far as I know the official Microsoft Active Directory Certificate Services (ADCS) documentation has not been updated to the last 2019 version, most of what applies to the existing documentation applies to the newer version as well.
Active Directory Domain Services Overview
https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/get-started/virtual-dc/active-directory-domain-services-overview
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Best regards,
Leon