I have managed to set a host SPM priority using SpmBuilder spmBuilder = new SpmBuilder().priority(7); sysService.hostsService().hostService(host.id()).update().host(host().spm(spmBuilder)).send(); However I cannot use similar code to set a Host to SPM. I currently have 2 active hosts in the same cluster in my system. Through the UI I can move SPM back and forth between them, but it is not working in the SDK. Any help appreciated.