Q

Queue folder

A folder in which messages that have yet to be delivered are stored.

Queue Viewer

A part of System Manager that lets you view and manipulate the messages in a queue.

query-based distribution group

An e-mail enabled distribution group whose group membership is determined by the results of an LDAP query created when the group is configured. Query-based distribution groups are new in Exchange Server 2003.

quorum disk

The disk set that contains definitive cluster configuration data. All members of an MSCS cluster must have continuous, reliable access to the data that is contained on a quorum disk. Information contained on the quorum disk includes data about the nodes that are participating in the cluster, the applications and resources that are defined within the cluster, and the current status of each member, application, and resource.