Submitting a new copy of this request as Boyce Zhu declined the original Idea with a comment that does not address the original suggestion.

"DOM gives preference to shipping orders completely from one location. Therefore, if a whole order and its lines aren't available from a location that has a priority of 1, DOM will try to fulfill it from a location that has a priority of 2."

In certain cases, the business would prefer that the order split ship between a priority 1 and priority 2 location instead of consolidating the entire order to a priority 2 location but there's no option to configure DOM this way. In our business-case, priority 1 is our DC and priority 2 contain our brick-and-mortar stores.

Take for example an order for 10 items. 9 out of the 10 items are available at a priority 1 DC location. All 10 items are available at a priority 2 store location. DOM will route all 10 items to the priority 2 store location. But we would prefer that the DC location fulfills 9 of the 10 items and the store location fulfills the last item. We'd prefer the store not wipe out that inventory that could have shipped from the DC.