Active directory as per name it is the directory of active objects in you Domain. Active directory first time introduced in windows 2000 family, in active directory, we can maintain all user records, printer, computer, groups, and OU records. Through active directory we can easily maintained or controlled all the domain resources. Active directory installed when you configure your server as Domain server.Printer Server on which machine printer attached physically and shared for everyone and you can specify permission and priority settings as per environment. Through printer, we can keep records like printing copies per user on many things.