Allow the Administrator to have all incoming and outgoing faxes for the entire account to be saved to a specific location that is not viewable or accessible by non-admins.

Just as an FYI, We are a law firm and all incoming and outgoing faxes that are transmitted/received by our physical fax machine, are saved on our server and Onedrive, along with the cover pages, in PDF format, to preserve the requirements we are subject to in our state. We use a commercial Sharp fax machine.