Active Directory Object Naming
Active Directory Naming is based on Lightweight Directory Application Protocol (LDAP) (RFC 1777) and Domain Name System (DNS).
Distinguished Name
A Distinguished Name (DN) is used to uniquely name an Active Directory Object. All objects can be referenced using a Distinguished Name. A DN has three components:
- DC - Domain Component
- O - Organization
- OU - Organizational Unit
- CN - Common Name
The Distinguished name takes the form:
/DC=organization/OU=Dept/CN=Win2kserver1
Where "Organization" is the name of the organization, and "Dept" is the department name.
A Relative Distinguished Name (RDN) is assigned by an administrator to an object. A Distinguished Name (DN) is a RDN with the location of the object in Active Directory.
UPN
A User Principal Name (UPN) (defined by RFC 822) is an RDN with a FQDN which is used for email and user logon.
The UPN takes the form:
Win2kserver1@Dept.Organization.org/document_name
Where "Organization" is the name of the organization, and "Dept" is the department name.
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