Microsoft Exchange Server 2003 Administrators Pocket Consultant

Universal Naming Convention.

User Principal Name. A UPN consists of the user's logon name and the DNS name of the domain where the account resides in-for example, Tony.Redmond@test.hp.com.

Unique Resource Locator. The format used to address Web objects.

Update Sequence Number. A 64-bit number that Windows uses to track updates to objects and attributes. It is the basis of all AD replication activities.