A UserPrincipalName (or UPN) is an attribute that contains an Internet-style login name for a user based on the Internet standard RFC 822. The UPN is used for a lot of different tasks, notably for Kerberos/Single Sign-On. As such, there are a lot of scripts that can now key off of a UPN. You can use the Get-ADUser cmdlet to query accounts for the UserPrincipalName attribute. To do so, we’re going to -Filter our results to display everyone (although we could include a username to only get one user) and then define the Search Base (using -SearchBase) to refine where in the query that the search will begin. Use the –Properties parameter…