I'm trying to automatically populate the segmentations on the Vendor Prepayments based on the linked PO. We create them either by clicking the button or through the standard menu path. But most of the time it's the former. It does not seem to be possible via workflow since the PO field is not exposed. But is it possible if I create a custom PO field on the PO (when creating Prepayments the button) and use it to source the value? It's definitely possible via scripting but we are leaning towards non-scripted solution.