Quite hard to get the control's right though, if I deposited some files in your OneDrive without asking then all sorts of issues could be created. Wouldn't it be better to use a group for the customer, then just add the right sales people?
Well it should respect permissions IMO, and the user can simply delegate/share folders in which to copy/move the content. Or admins can grant themselves permissions to both ODFB SCs and do the copy/move. In general, I would love to see the copy/move functionality expanded to cover more scenarios.