|Your question is very confusing.|
What "Mailbox" did you update? Were you logged into your computer with your usual login? Did you create a new Mail Delivery file?
"No matter how i try to go about it I am denied access" What exactly are you doing? Opening Outlook like you always did? Do you mean you actually have an archive.pst file, or is that just how you're referring to your "old" Outlook Mail Delivery file?