control messageA command used by USENET host computers to create and remove newsgroups or cancel messages that have already been posted. [Exchange 5.5]
Copy SuspendOne of four health states of a storage group copy. Copy Suspend indicates that an administrator has temporarily halted log copying. [Exchange 2007]
cross certificationEnables organizations to establish trust with other organizations so that users can verify the digital signature of messages sent by users in other…
CTL (certificate trust list)A signed list of root certification authority certificates that an administrator considers reputable for designated purposes, such as client…
CTP (Conference Technology Provider)A provider of data conferencing services such as real-time video, audio, and telephony integration. [Exchange 2000]
custom address listAn address list created to help users who need a custom view of recipients within an Exchange organization.
custom phraseA word or phrase that the administrator sets for the Content Filter agent to evaluate the content of an e-mail message and apply appropriate filter…
custom recipientIn Exchange 5.5 and earlier, a custom recipient is a user who is not hosted by Exchange.
DACL (discretionary access control list)The part of an object's security descriptor that grants or denies specific users and groups permission to access the object.
default address listAn address list that is automatically created based on the values of specific attributes of Active Directory objects.
Defense In-DepthLocating mutually supportive defense positions in such a manner as to absorb and progressively weaken an attack, prevent initial observations of the…
delayed fan-outFunctionality on the Exchange Server 2007 Hub Transport server role where the server uses site link information to optimize the routing of messages that…
delegateA person with permission to manage mail for another user, send mail for another user, or do both. [Exchange 5.5]
delegationAn assignment of administrative responsibility to a user, computer, group, or organization. [Exchange 2003]
Delivery queueA queue that is used to hold messages that being delivered to a Mailbox server or remote location.
device credentialsAuthentication information provided from a device to gain access to the enterprise network. [Exchange 2003]
device passwordA passcode that a user enters on a mobile device that supports the Exchange ActiveSync protocol.
Dial by NameA feature that enables a caller to enter a person's name using the keys on a telephone. [Exchange 2007]
dial planA grouping of telephony users with some specific properties, such as unique telephone extension numbers, that allow the Private Branch eXchange (PBX) to…
dictionary attackA method of guessing a user's password or PIN by trying every word in the dictionary until successful. [Exchange 2007]
Digest authenticationAn authentication method that prompts the user for a user name and a password, also called credentials, which are hashed with other data before being…
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]
Direct PushA technology that ensures that a mobile device automatically retrieves new e-mail from the Microsoft Exchange server.
direct trustIn Exchange Server 2007, authentication functionality for which the presence of the certificate in the Active Directory directory service or Active…
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 harvest attackAn attempt to collect valid e-mail addresses from a particular organization so that the e-mail addresses can be added to a spam database. [Exchange 2007]
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.
disclaimerA patentee, whether of the whole or any sectional interest therein, may, on payment of the fee required by law, make disclaimer (give up all or part of…
display nameA descriptive name that is assigned to a directory object when it is created. The display name is predominantly used in user interfaces such as client…
distinguished folderA folder in a mailbox that can be referenced by Web services requests to identify a folder by name.
distinguished nameA name that uniquely identifies an object by using the relative distinguished name for the object, plus the names of container objects and domains that…
distribution groupA group of recipients created to expedite mass mailing of messages and other information.
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…
DomainPrepA tool that is used during deployment to create the groups and permissions that are required for Exchange servers to read and modify user attributes.
DoS (denial of service attack)An attempt by a malicious (or unwitting) user, process, or system to prevent legitimate users from accessing a resource (usually a network service) by…
DR (delivery receipt)A notice confirming that a message was delivered to its intended recipient. [Exchange 5.5]
Drop directoryIn Exchange Server 2007, a directory used by each Foreign connector to send messages to an internal foreign gateway server that does not use the Simple…
DSAccessThe Exchange 2000 component that provides directory lookup services for components such as Simple Mail Transfer Protocol (SMTP), Message Transfer Agent…
DSN (delivery status notification)Notification that reports the result of an attempt to deliver an e-mail message. DSNs are designed so they can be read by humans or computers.
DSProxyThe Exchange 2000 component that can proxy (and refer) Messaging Application Programming Interface (MAPI) directory service requests from Outlook clients…
dynamic distribution groupA distribution group that uses recipient filters and conditions to derive its membership at the time the message is sent.
Dynamic Distribution ListA collection of recipients, based on a Lightweight Directory Access Protocol (LDAP) query that an e-mail message can be sent to. [Exchange 2003]
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).
e-mail addressesThe addresses by which recipients (mailboxes, distribution lists, custom recipients, and public folders) are known to foreign systems. [Exchange 5.5]
Edge Rules agentAn agent that enables organizations to apply anti-spam-based transport rules to e-mail messages that are sent between an Exchange Server 2007 organization…
Edge SubscriptionThe record of an Edge Transport server that has been subscribed to an Exchange organization and to which the Microsoft Exchange EdgeSync service…
Edge Subscription fileThe XML file that is exported on the Edge Transport server and imported on the Hub Transport server to establish an Edge Subscription. [Exchange 2007]
Edge Transport[server role] An Exchange Server 2007 server role that provides anti-spam and antivirus protection and applies messaging security policies to messages in…
Edge Transport server roleAn Exchange Server 2007 server role that provides anti-spam and antivirus protection and applies messaging security policies to messages in transport…
EdgeSyncA collection of processes that are run on the Exchange Server 2007 Hub Transport server role to establish one-way replication of recipient and…
EdgeSync synchronizationThe task or process that the Microsoft Exchange EdgeSync service performs to propagate data from the Active Directory directory service to the subscribed…
EncryptionA procedure that renders the contents of a message or file unintelligible to anyone not authorized to read it.
Enhanced Document AvailabilityA set of Microsoft Exchange features that offers increased access to documents even when the documents are located on an internal network or the software…
envelope journalingEnvelope journaling differs from message-only journaling and Bcc journaling because it permits you to archive transport envelope information (P1 message…
envelope message overheadThere is a small overhead for each journalized message, because the envelope journal message includes a plain text report with the original message…
equipment mailboxAn equipment mailbox is a type of resource mailbox that is assigned to a non-location-specific resource such as a laptop projector, microphone, or company…
Error Code LookupA tool that can help to determine error values from decimal and hexadecimal error codes in Microsoft Windows operating systems.
ESE (Extensible Storage Engine) (fka JET)Formerly known as Joint Engine Technologies (JET), the ESE is a method that defines a very low-level Application Programming Interface (API) to the…
ethical wallA zone of non-communication between distinct departments of a business or organization to prevent conflicts of interest that might result in the…
EUDPD (European Union Data Protection Directive)This directive standardizes the protection of data privacy for citizens throughout the European Union (EU) by providing baseline requirements that all…
eventIn LotusScript, an action or occurrence to which an application responds. That action can be a user-generated one, such as a mouse click; a…
Event ServiceA Windows NT service that is installed by Exchange Server 5.5. This service allows programmers to write programs that use Exchange's Event Handler to…
Event sinkA piece of code that is activated by a defined trigger, such as the reception of a new message.
EXCH50 binary large objectA set of properties, generated and managed by Exchange Server, which is stored with each message and contains metadata about a given message.
Exchange ActiveSyncA Microsoft program that manages synchronization of information, including e-mail, schedules, and application files, between a handheld PC and a desktop…
Exchange Management ConsoleThe Exchange 2007 graphical user interface (GUI) from which administrators can perform tasks to configure and manage Exchange servers.
Exchange Management ShellA command-line interface and associated command-line plug-ins for Exchange Server that enable automation of administrative tasks.
Exchange Organization Administrators roleOne of four Exchange 2007 administrator roles. Members of the Exchange Organization Administrators role have full access to all Exchange properties and…
Exchange Profile UpdateA tool that can be used to update Outlook profiles after mailboxes have been moved across Exchange organizations or administrative groups.
Exchange Recipient Administrators roleOne of four Exchange 2007 administrator roles. Members of the Exchange Recipient Administrators role have permissions to modify any Exchange property on…
Exchange Server 2007 Setup wizardThe wizard for installing Exchange Server 2007. This wizard has a graphical user interface (GUI) that guides an administrator through the installation of…
Exchange Server Administrators roleOne of four Exchange 2007 administrator roles. Members of the Exchange Server Administrators role have access to only local server Exchange configuration…
Exchange Stress and Performance 2003A tool that you can use to simulate a large number of client sessions by concurrently accessing one or more protocol servers.
Exchange View-Only Administrators roleOne of four Exchange 2007 administrator roles. Members of the Exchange View-Only Administrators role have read-only access to the entire Exchange…
Exchange Web ServicesA set of features that provides a programming interface for accessing Microsoft Exchange data through the Client Access server role by using Web services.
Exchange-enabled objectAn object in Active Directory that has one or more Exchange-specific attributes enabled. [Exchange 2003]
EXIPC (fka Epoxy)A queuing layer that allows the Internet Information Server (IIS) and store processes (Inetinfo.exe and Store.
extended permissionA permission that is specific to an object added to the standard Active Directory object schema by Exchange. [Exchange 2003]
extended rightsRights added by Exchange to Active Directory for controlling access to Exchange objects. [Exchange 2003]
failoverA cluster's ability to redirect requests from one server to another. Failover occurs when a user tries to access an application on an unavailable server…
fallback actionThe action that an Exchange Server 2007 transport rule takes if a disclaimer cannot be applied to an e-mail message as, for example, when a message is…
false positivetest result that states that an analyte is present, when, in fact, it is not present or, is present in an amount less than a threshold or designated…
fan outThe process of splitting a message to deliver e-mail messages to individual recipients. [Exchange 2007]
fan-out threadA thread that creates multiple message copies and places them in the appropriate link queues.
Fault-ToleranceThe ability of a processor to maintain mission effectiveness after some subsystems failed.
file share witnessA new type of Majority Node Set (MNS) quorum in Windows Server 2003. In Exchange Server 2007, cluster continuous replication (CCR) uses the MNS quorum…