If any proprietary process flow or workflow layer is used, check whether it is in compliance with BPEL standards by porting to external BPEL design tools and runtime engines.

By default, it's shipped with the external program always returning success instantly; the actual license check is optional and must be explicitly enabled.

For example, those systems can check whether or not work items exist and can update the work items with new data in response to status-changing events in the external systems.