You can disable server-side postprocessing of a flow action or a question smart shape for offline-enabled cases. This is required when you want to avoid duplicate processing of a work item. For example, if you have a postprocessing activity that increments a counter property on a work page in an offline-enable case, you only need to increment it once on the client when in offline mode and not a second time, on the server, when the offline-enabled application is connected to the network.