Check your options under reports, I seem to remember that enterprise had a where used stock status report for assembly items, check all the menu’s not just under inventory, I think it was under some other heading

but push come to shove there is a third party utility that will do […]

Resolution for 'BOM items issue: 'Is there a way to show the current inventory status for all BOM items within an assembly using a report?' available: Yes.

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