An Apple ID is your user name for everything you do with Apple: Shop the iTunes Store, enable iCloud on all your devices, buy from the Apple Online Store, make a reservation at an Apple Retail Store, access the Apple Support website, and more. 1  Home. 2  Apple ID.
Windows 2000 Active Directory data store, the actual database file, is %SystemRoot%\ntds\NTDS.DIT. The ntds.dit file is the heart of Active Directory including user accounts. Active Directory's database engine is the Extensible Storage Engine ( ESE ) which is based on the Jet database used by Exchange 5.5 and WINS. The ESE has the capability to grow to 16 terabytes which would be large enough for 10 million objects.
An active directory is a service that is provided by Microsoft that stores information about items on a network so the information can be easily made available to specific users through a logon process and network administrators.n Active Directory performs a variety of tasks which include providing information on objects such as hardware and printers and services for the end users on the network such as Web email and other applications.