You must use the Orchestrator configuration interface to install the PowerShell plug-in. You use the Orchestrator client to run and create workflows and access the plug-in API.
The PowerShell plug-in is powered by vRealize Orchestrator. Orchestrator is a development and process-automation platform that provides a library of extensible workflows to manage the VMware vCenter infrastructure and other technologies.
Orchestrator allows integration with management and administration solutions through its open plug-in architecture. PowerShell is one example of an administration solution that you can integrate with Orchestrator by using plug-ins.