Microsoft Active Directory stores information about objects on the network in a way that makes it easy for administrators and users to find the information they need. Active Directory uses a structured data store and organizes directory information hierarchically. Active Directory's structure is based on domains (a logical group of network objects, such as devices or users), trees (hierarchical collections of domains) and forests (hierarchical groupings of trees that share the same global catalog and directory schema). Objects in the data store include shared resources, such as servers, volumes, printers and network user and computer accounts. Logon authentication and access control provide integrated security in Active Directory.