G

Global Address List

The list of all Exchange Server recipients in the entire Exchange organization. Exchange uses address lists to hold and organize the names of the recipients associated with the system.

Global Catalog server

A server that holds a complete replica of the configuration and schema naming contexts for an Active Directory forest, a complete replica of the domain naming context in which the server is installed, and a partial replica of all other domains in the forest. The Global Catalog knows about every object in the forest and has representations for them in its directory; however, it might not know about all attributes (such as job title and physical address) for objects in other domains.

globally unique identifier (GUID)

An attribute consisting of a 128-bit number that is guaranteed to be unique, used by applications that need to refer to an object by an identifier that remains constant. A GUID is assigned to an object when it is created, and it will never change, even if the object is moved between containers in the same domain.

group

An object defined in Active Directory that contains other objects such as users, contacts, and possibly other groups. A group can be either a distribution group or a security group, and its scope can be local, domain, or universal. Distribution groups are similar to distribution lists in Exchange Server 5.5.

GUID

See globally unique identifier (GUID).