Two workflows can be used:
FocusPoint has an Order Approval process, which can be set up so that any orders purchased via Terms/Purchase Orders, or an order over X amount has to be approved by a FocusPoint manager before the order is sent to SAP.
FocusPoint Order Approval can be turned off to use native SAP. Orders can be placed into SAP as unapproved and respective internal business processes can be used to validate/approve the sales order in SAP.