Commented Unassigned: ActiveDirectory AddUser task doesn't allow to set the user's first name and last name [12492]

The active directory task doesn't have any properties to allow setting the first name and the last name of a user. As a result when a user is created, only the display name property is set.
Comments: Associated with changeset 86684: Computer\ActiveDirectory.cs: Fix Docs and use a warning rather than a message if FirstName / LastName can't be set.