I am a Sage 300 ERP 2014 user. I want a user to be able to generate a serial number either at the time of shipment or the time of invoice, in OE.  The v5.5 user guide gave the following instructions:

Allow the user to generate serial numbers in OE.  When you select this option, a Generate button appears on the serial number allocation form during O/E Order/Shipment Entry, and an Auto Generate button appears during O/E Credit/Debit Note Entry, enabling you to generate serial numbers during transaction entry.

But I cannot find the same option in  the newer version.  We do not know the serial number until time of shipping, and so I do not want to have to first enter a serial number into I/C and then have to allocate it, I just want to generate it in OE shipping or invoicing window.  What setup option do I have to choose to get the "Generate" button on the Serial Numbers Allocation window that pops up in OE Shipment window when I click on Qty shipped column header?