D

delivery report

A report sent to the originator of a message when the message is successfully delivered to one of its intended recipients.

directory

The central repository of user and Microsoft Exchange Server system information for an organization.

directory access functions

A set of functions included with the Microsoft Exchange Server SDK that are used to manage information in the directory. Directory access functions are typically used for managing objects when creating and maintaining custom add-on services, managing a large number of directory objects at one time, synchronizing Microsoft Exchange Server directory objects with other directory services, and automatically updating Windows NT Server user accounts as directory objects are updated.

distinguished name (DN)

A unique name that identifies an object. In Microsoft Exchange Server, the combination of an object’s name and the path leading to the object.

distribution list (DL)

A MAPI address book object that represents a set of individual recipients addressed together as a group, which implements the MAPI IDistList interface. Distribution lists can contain other distribution lists and individual recipients. A distribution list is one type of a MAPI address book objects that can receive messages; the other type is a mail user object.