U
unidirectional replication

One-way replication. Replication travels in one direction only.

Universal group

An Active Directory security or distribution group that can contain members from, and be accessed from, any domain within an Active Directory forest. A domain must be running in native mode to use Universal groups.

User account

See user object.

User object

Active Directory object that is a security principal and that identifies individuals that can log on to a domain. User accounts contain information about individuals, as well as password and other permission information.

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