Universal Principle Name. The value for a logged-in user that includes the login name combined with the domain to which the user belongs. For example, user bill in domain sesta.com has the UPN [email protected].
User Principal Name. A friendly name that references a user in AD. The UPN consists of the user's logon name and the DNS name of the domain where the user's object resides. For example, [email protected].
UPN (which originally stood for the United Paramount Network) was a television network in over 200 markets in the United States. UPN was owned by CBS Corporation, which also owns the more widespread CBS network. UPN shut down on September 15, 2006, and was replaced with The CW Television Network.