How can we cancel Inter-company Sales Orders?

Currently Inter-Company #1 creates a PO on their end, generating a Sales Order to us Inter-Company #2.

We need to cancel the order due to duplication in our system. Inter-Company #2 can’t delete the order so it still appears as an “Open Sales Order” in our system. What can the Inter-Company #1 do on their end to update both systems and show the status as “cancelled”?

Thanks.

have you tried cancelling the PO at the company1? as that’s the one which created the SO in company 2, it should work.