Edit the configuration in CA Service Desk Manager by going to Administration > System > Configurations, and set each webengine to use its own dedicated domsrvr. Then you must run pdm_configure on all secondary servers, and then on the primary to invoke this change. Once configure is run, and the systems are started back up, the webengine(s) on the secondary server(s) will only connect to their own dedicated domsrvr, and the spelcode will then be executed on the secondary server(s) and not the primary.