The Active Directory Service Interfaces (ADSI) is a set of Component Object Model (COM) interfaces. So that use to access the features of directory services from different network providers and from within client applications. Therefore, ADSI enables developers and network administrators to easily manage network resources. By providing a way to automate tasks. From a net-admin perspective, these tasks can include user management and printing device configuration. Whereas from a developer perspective, ADSI provides a way to develop directory – enabled applications.It is a free Ebook and you can download easily. For downloading click the link http://bit.ly/2rk4dAZ .