Generally, a person can easily manage the administration of their own email, including the junk Mail folder. If you are on a company network this might be different…..but you could really add some more information here such as: environment (your home, or company network) what happens when you try (are you getting an error that mentions permissions? Is this why you are looking to change administrative settings?). The more you add, the easier it is to assist you.
Exchange, Domino etc etcIf Exchange are we talking Junk or Junk2 – these are retention folders.