text: what is active directory?   ldap (lightweight directory access protocol) is a software protocol for enabling anyone to locate organizations, individuals, and other resources such as files and devices in a network, whether on the public internet or on a corporate intranet. ldap is a "lightweight" (smaller amount of code) version of directory access protocol (dap), which is part of x.500, a standard for directory services in a network. ldap is lighter because in its initial version it did not include security features. ldap originated at the university of michigan and has been endorsed by at least 40 companies. netscape includes it in its latest communicator suite of products. microsoft includes it as part of what it calls active directory in a number of products including outlook express. novell's netware directory services interoperates with ldap. cisco also supports it in its networking products.  in a network, a directory tells you where in the network something is located. on tcp/ip networks (including the internet), the domain name system (dns) is the directory system used to relate the domain name to a specific network address (a unique location on the network). however, you may not know the domain name. ldap allows you to search for an individual without knowing where they're located (although additional information will help with the search).