Extensiv Order Manager can help you automate your order fulfillment by sending all orders (or a subset of orders that meet certain criteria) to a specific warehouse. This automation would be configured in Order Manager via an Orderbot. For more information on what an Orderbot is, click here.
For this particular Orderbot, you would want to set the Apply Automatic Actions to "Set Warehouse" and select which warehouse in Order Manager you want the orders routed to.
In the example below, all sales orders from the eBay sales channel, are being routed to the In-House Warehouse. If you wanted to specify other order filter criteria, you can set that in the Filter Orders By section. For more information on how to create Orderbots, click here.