What's the Principal Name

A principal is essentially another name for a company owner or member; at some corporations, the principal is also the founder, CEO, or even the chief investor.

What is my user principal name?

In the Windows operating 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.

How do I change my principal name?

Windows 7 and 8.1 devices are not affected by this issue after UPN changes.