Single shipment from multiple shipment depot
I'd like to know if there is a way to consolidates 2 shipments from different shipment depots into one. I need this because in case of exports I can have only one set of documents for customs, even if goods inside come from different warehouse.
Example: I have an order for 1.000 pieces.
Stock is available: 600 in shipment depot A, 400 in shipment depot B
how can I make this be a single shipment?
PS: I'd rather avoid transfering goods from one depot to another to regroup them before shipment
PPS: Otherwise, is there a way to link multiple Branch Plant to the same Shipment depot?