Windows - Glossary of Terms

AAD = Azure Active Directory (now Microsoft Entra ID) 

 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 Last verified: October 2026 Sources: https://learn.microsoft.com/en-us/entra/fundamentals/new-name