Začni třeba tady:
https://www.samuraj-cz.com/serie/ldap-a-active-directory/
https://www.samuraj-cz.com/clanek/dns-domain-name-system-zamereno-na-microsoft/
Jinak samozřejmě web MS atd.
https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/get-started/virtual-dc/active-directory-domain-services-overview