M

Mail and Directory Management (MADMAN) MIB

A specialized version of the base Management Information Base that was created for monitoring messaging systems. See also Management Information Base (MIB).

mailbox

The generic term referring to a container that holds messages, such as incoming and outgoing messages.

mailbox-enabled user

A user who has been assigned an Exchange Server mailbox.

mailbox store

A set of two databases (a rich-text file and a streaming media file) on an Exchange server that hold mailboxes. See also store.

mail-enabled user

A user who has been given an e-mail address but no mailbox.

Mail Exchanger (MX) Record

A record in a DNS database that indicates the SMTP mail host for an organization.

mainframe computing

Consists of a powerful host computer, such as a mainframe computer or minicomputer, and numerous input-output devices attached to the host, such as terminals, printers, and personal computers running terminal emulation software.

majority node set cluster

A new high-end clustering model first available in Windows Server 2003 that allows for two or more cluster nodes to be configured so that multiple storage devices can be used. The cluster configuration data is kept on all disks across the cluster, and the Microsoft Clustering Service is responsible for keeping this data up-to-date.

Management Information Base (MIB)

A set of configurable objects defined for management by the SNMP protocol.

MAPI

See Messaging Application Programming Interface (MAPI).

MAPI client

A messaging client that uses the Messaging Application Programming Interface (MAPI) to connect to a messaging server. See also Messaging Application Programming Interface (MAPI).

MAPI subsystem

The second layer of the MAPI architecture; this component is shared by all applications that require its services and is therefore considered a subsystem of the operating system.

message state information

Information that identifies the state of a message in a public folder. Message state information is made up of a change number, a time stamp, and a predecessor change list.

Message Transfer Agent (MTA)

X.400 component that is used to route messages in previous versions of Exchange Server and is still used with the X.400 Connector.

Message Transfer Agent (MTA) Service Transport Stack

A set of information about the software and hardware making up the underlying network that is used by an X.400 Connector. The use of the transport stack allows for a layer of abstraction between the X.400 Connector and the network itself.

Message Tracking Center (MTC)

An interface within System Manager used to search for messages sent within an Exchange organization and then track the route taken by those messages.

Messaging Application Programming Interface (MAPI)

An object-oriented programming interface for messaging services, developed by Microsoft.

Microsoft Clustering Service (MSCS)

A Windows service that provides for highly available server solutions through a process known as failover. An MSCS cluster consists of two more nodes ( members ) that are configured such that upon the failure of one node, any of the remaining cluster nodes can transfer the failed node ‚ s resources to itself, thus keeping the resources available for client access.

Minimum installation

This installation type installs only the Exchange Server 2003 software and the basic Messaging and Collaboration components .

Microsoft Management Console (MMC)

A framework application in which snap-ins are loaded to provide the management of various network resources. System Manager is an example of a snap-in.

Microsoft Office Outlook 2003

The premier client application for use with Exchange Server 2003.

Microsoft Search Service

The service that performs full-text indexing of mailbox and public stores.

migration

Moving resources, such as mailboxes, messages, etc., from one messaging system to another.

mixed mode

In mixed mode, Exchange Server 2003 can coexist and communicate with previous versions of Exchange Server in the same organization.

Monitoring and Status tool

A tool within System Manager used to set up the services monitored on a server and configure the notifications that are triggered when a monitored service fails.

mounting

The process of bringing a private or public store online. See also dismounting .

Multipurpose Internet Mail Extensions (MIME)

An Internet protocol that enables the encoding of binary content within mail messages. For example, MIME could be used to encode a graphics file or word processing document as an attachment to a text-based mail message. The recipient of the message would have to be using MIME also to decode the attachment. MIME is newer than UUENCODE and in many systems has replaced it. See also Secure/Multipurpose Internet Mail Extensions (S/MIME), UUENCODE.

multimaster replication model

A model in which every replica of a public folder is considered a master copy.

MX

See Mail Exchanger (MX).