delegateA person with permission to manage mail for another user, send mail for another user, or do both. [Exchange 5.5]
digital signatureThe electronic equivalent of a handwritten signature, a digital signature is a unique block of text that verifies a user's identity and is appended to a…
direct postofficeA postoffice connected through a local area network (LAN), an asychronous connection, or an X.25 connection. [Exchange 5.5]
DirectoryA simulated file folder or container used to organize files and directories in a hierarchical or tree-like structure.
directory exportThe process of exporting user account information from the directory. [Exchange 5.5]
directory hierarchyIn the Administrator program, the hierarchical structure of objects in the directory. [Exchange 5.5]
directory importThe process of importing user account information into the directory. [Exchange 5.5]
directory objectA record such as a server, mailbox, or distribution list in the directory. Every object has properties that can be defined. [Exchange 5.5]
directory replicationThe process of updating the directories of all servers within and between sites. [Exchange 5.5]
directory replication bridgehead serverAn Exchange computer that acts as the endpoint of a directory replication connection between its site and a remote site, and requests directory updates…
directory synchronizationThe process of synchronizing directory information about Exchange users from Active Directory with the directory of another messaging system.
distribution listA group of recipients addressed as a single recipient. Administrators can create distribution lists that are available in the Address Book.
DomainA sub-network of servers and computers within a LAN. Domain information is useful when restoring backup tapes, particularly of email.
domain controllerIn an Active Directory forest, a server that contains a writable copy of the Active Directory database, participates in Active Directory replication, and…
DR (delivery receipt)A notice confirming that a message was delivered to its intended recipient. [Exchange 5.5]
Dynamic RAS ConnectorAn Exchange component that routes messages between sites on the same local area network (LAN) using the Windows NT Remote Access Service (RAS).