Windows - Glossary of Terms AAD = Azure Active Directory ADCS = Active Directory Certificate Services ADDS = Active Directory Domain Services AIA = Authority Information Access CA = Certificate Authority CDP = CRL Distribution Point CRL = Certificate Revocation List CSR = Certificate Signing Request ed25519 = Edwards-curve Digital Signature Algorithm GPO = Group Policy Object IP = Internet Protocol LDAP = Lightweight Directory Access Protocol MMC = Microsoft Management Console OCSP = Online Certificate Status Protocol PKI = Public Key Infrastructure RSA = (Rivest-Shamir-Adleman) SHA = Secure Hash Algorithm SPN = Service Principal Name TCP = Transmission Control Protocol UPN = User Principal Name