MBR (Mail-based replication)A mechanism to replicate directory information through a messaging transport. This term applies to Exchange 5.
MCU (Multipoint Control Unit)A reference to the T.120 protocol that allows clients to connect to data conferencing sessions.
MDB (message database)An instance of a database implemented in Exchange server. A single MDB is normally identified as being public or private depending on the type of data…
MetabaseA store that contains metadata such as that used by Internet Information Server IIS to obtain its configuration data.
Metabase update serviceA component in Exchange 2000 that reads data from Active Directory and transposes it into the local IIS metabase.
metadataMetadata is information about a particular data set which may describe, for example, how, when, and by whom it was received, created, accessed, and/or…
MTA (message transfer agent)The component in all versions of Exchange Server that transfers messages between servers using the X.400 protocol. [Exchange 2000]