I use a drop ship model. When a customer places one order which requires fulfillment from two different vendors, does the Order Management System split up the order by vendor automatically? How are shipping charges handled?
Nexternal does support multiple ship from locations. You can add or edit ship from locations in the Settings section of the OMS. You'll then designate a ship from location for each product along WITH an appropriate Vendor. When rates are calculated and displayed to the customer, the rate will be blended if Independent Shipping is off (Settings/Edit Site Options/Ship From). If Independent Shipping is on, it will be clear the the customer that the items are shipping from different locations with two distinct shipping charges. Regardless, when an order is placed for products with two separate vendors, the order is not split into two orders. However, each drop ship vendor will be notified of just the items he or she needs to ship.