The user record itself only has one shipping address, edited from the Preferences tab — the admin panel doesn't expose a full address-book UI there. A separate delivery-addresses table does exist and backs a full address book (add, edit, delete) on the customer-facing profile/checkout pages, and the admin panel also reads from it in one narrow place: a tax-jurisdiction re-resolution tool used when refreshing tax settings for a saved or typed-in address. But there's no general admin-side screen to browse or manage a customer's full address list.