If you are using vRealize Automation workflows to call vRealize Orchestrator workflows, you must configure the vRealize Orchestrator instance or server as an endpoint.
You can associate a vRealize Orchestrator endpoint with a machine blueprint to make sure that all of the vRealize Orchestrator workflows for machines provisioned from that blueprint are run using that endpoint.
vRealize Automation by default includes an embedded vRealize Orchestrator instance. It is recommended that you use the embedded instance as your vRealize Orchestrator endpoint for running vRealize Automation workflows in a production or test environment or when creating a proof of concept.
You can also install a plug-in on an external vRealize Orchestrator server, although this method is not recommended for production.