Change RD Session Host Site assignment
You can assign an RD Session Host to a different Site in your Farm if needed. Please note that this functionality is only available if you have more than one Site in your Farm.
To change the Site assignment:
Right-click an RD Session Host and then click Change Site in the context menu. The Change Site dialog opens.
Select a Site in the list and click OK. The server will be moved to the RD Session Hosts list of the target Site (Farm > <new-site-name> > RD Session Hosts).