The number of processes that may be active in parallel for processing an asynchronous inbound message depends on the application scenario, but may only be as high as the number of available processes minus one. By default, the proxy is started with the setting that a maximum of two processes at a time may be active for processing asynchronous inbound messages.
You can change the number of processes in the Management Console:
From the context menu of the proxy, select the item Edit Properties.
In the Edit Properties of Local/Remote Proxy property sheet choose the Performance Settings tab.
Under Number of Proxy Containers change the value for For Asynchronous Jobs.
You must activate the Expert Mode to display the Performance Settings tab. For detailed information refer to the online help system of the Management Console.