You can use the Assignment Service shape to send a request from a flow to a service. By integrating external applications with your process, you can add more functionality to your application.
Add the Assignment Service shape to your flow.
Open a flow by searching for it or by using the Application Explorer.
On the Diagram tab, click the Flow shapes icon, and then click Advanced > Assignment Service.
Drag the Assignment Service shape to a position on the flow diagram, based on the order of events in the flow.
Connect the Assignment Service shape, by dragging connector end points to connection points on different shapes in the flow.
Double-click the Assignment Service shape to open the property panel.
In the Type field, press the Down Arrow key and select an activity with Activity type set to Rule Connect.
Click Submit to close the property panel.
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