O
objects

Units stored within Active Directory.

operations master

A special domain controller that is solely responsible for specific parts of the Active Directory, such as the schema, domain naming, or relative ID (RID).

organizational unit (OU)

Used to logically organize the Active Directory objects (such as similar accounts or machines) within a domain. An OU is the smallest component within a domain to which administrative permissions and group policies can be assigned. OUs serve as containers within which other Active Directory objects can be created, but they do not form part of the DNS namespace.

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