vRealize Orchestrator and vRealize Automation provide the architecture that supports the functions of vRealize Orchestrator Plug-in for Horizon.
vRealize Orchestrator plug-ins enable a consistent automation between the software environment in which the workflows run and the products with which the workflows interact. With vRealize Orchestrator Plug-in for Horizon, workflows can be exposed natively to delegated administrators through VMware vSphere® Web Client and the vRealize Automation service catalog. You can customize and configure the workflows in the vRealize Orchestrator client.
The following diagram illustrates the architecture of vRealize Orchestrator Plug-in for Horizon.
![The plug-in is installed in Orchestrator, but the workflows are used in vSphere Web Client and vCloud Automation Center.](images/GUID-8BFAC7EC-0EB0-4CF0-9C23-8328911D625D-high.png)