You can use proxy workflows to manage the interaction between the local vRealize Orchestrator server and workflows on a remote vRealize Orchestrator server.
You can use the Multi-Node plug-in to generate local workflows which interact with remote workflows. These local workflows are called proxy workflows. A proxy workflow takes the input parameters from the inventory of the Multi-Node plug-in. When you run the proxy workflow, it converts the parameters to the types required by the remote workflow. When the remote workflow finishes its run, the output parameters are converted back to the local representation on the primary vRealize Orchestrator server.