Purchase process automation from Customer purchase order to Navision sales order then purchase order


After craming my self with the manuals, I still don’y know how to duplicate the automated Purchase process in our current

ERP system to Navision. Now, we receive customer PO with FTP and use timer to import those flat files to the ISAM

database then Sales order/Purchase order will generate automatically and go to the folders for EDI, Is there any one has

an idea about how to implement the same purchase process in Navision? Drop shipment and what else?

Thanks in advance

There is functionality called Special order in Navision .Just have look.