- In the Windowsoperating system's Active Directory, a User Principal Name (UPN) is the name of a system user in an e-mail address format. The user name (or "username") is followed by the "at sign" followed by the name of the Internet domain with which the user is associated. An example might look like: bill.yeti@walkingstick.kathmandu.np. The UPN format is based on Internet RFC 822.
Learn more about Microsoft Exchange Server and Active Directory
Top 10 Microsoft Exchange Server tips of 2008: These top Exchange Server tips explain how to grant or deny mailbox permissions, filter spam in Exchange 2007, back up and restore Exchange data and more.
TechTarget provides technology professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective purchase decisions and managing their organizations' technology projects - with its network of technology-specific websites, events and online magazines.