This document provides an overview of user and group account types and management in Active Directory. It discusses the three types of user accounts - local, domain, and built-in - and explains how domain accounts are stored centrally and replicated across domains. It also outlines the different types of groups - security, distribution, domain local, global, and universal - and how they can be nested to simplify permission assignments using the AGUDLP strategy. Finally, it lists several methods for automating user and group creation in Active Directory.