If you are unable to view Historic Sales Orders it is possible that 'Show Outstanding Only?' has been ticked, if so this will hid all Historic Sales Orders.
To check this, please do the following:
Click Sales
Click Sales Order Menu
Click Sales Order Maintenance
Click on the 'Historic' tab
On the bottom right you will see a tick box for 'Show Outstanding Only'. Once this is ticked, all Historic Sales Orders will become visible.
