Many customers wants to control their purchases using an approval workflow. These controls are required whatever the delivery type means: either receive goods in own stock or by delivery directly the customer. today in D365 F&Ops, change management can be used to trig workflow approval for PO ONLY if this PO is not created as direct delivery. the same way of work is observed for intercompany purchase orders. in that case you are blocked to create the PO and to workaround, you need to activate setup "Override settings per vendor". if you do that, PO can be created but workflow approval is disabled. This way of work can make sense in case of intercompany as this is the same company group but it is senseless in case of a PO for a another vendor. it means you can bypass approval controls just by changing the delivrey type. Idea would be to adapt standard to allow usage of change management whatever the delivery type. Workflow approval for PO would be more consistent. as example: maybe create a setup to select all fields that if they are modified on SO then they will trig a "request change" on PO and force user to submit again. if modified field is not part of this list then accept the change without new submission