Difference between RMA & InterUnit Expensed Issue Returns?

Our current instance of PeopleSoft FSCM has multiple General Ledger Business Unit (GLBU) and Inventory Business Units (INBU). Our business model results in many internal orders and inventory issues across GLBUs. We want to link all the internal returns to the original order or issue. This should be possible using the Internal Shipment History on the RMA Form or the Search History on Expensed Issue Return.

The current understanding is the only way to return an item to an INBU when it was issued to a GLBU that is different from the GLBU associated to the INBU is to use an Expensed Issue Return and Search History. When we try to use the RAM Form with Internal Shipment History, we are unable to locate the order. The problem we are encountering is Expensed Issue Return is a single step process, as soon as the page is saved, the item is returned to inventory. Unlike the RMA Form which generates an Interunit Receipt for putaway. Our inventory