Global
catalog is a role, which maintains Indexes about objects. It contains full
information of the objects in its own domain and partial information of the
objects in other domains. Universal Group membership information will be stored
in global catalog servers and replicate to all GC’s in the forest.
- Maintains information about all attributes of its Domain, also partial information of attributes of all objects in the entire forest
For ex: Users1, User2, User3 from different domains, need to access printer, move all the users into Global group or Universal group.
Note: 1 Global Catalog per Site