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Active Directory (AD) is a directory service developed by Microsoft for Windows domain networks. It stores and organizes information about users, computers, and other resources, allowing administrators to manage permissions, security policies, and access controls within a centralized framework. Active Directory uses a structured data hierarchy and operates on domain controllers to authenticate and authorize users and devices. It supports services like LDAP (Lightweight Directory Access Protocol), Group Policy, and Single Sign-On (SSO), making it a core component for managing enterprise IT infrastructure efficiently and securely.
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