If you select one or more services, the package deploys only to Service Hosts that run selected services. That is, when you configure a new service for the existing Service Host, there is no additional deployment for the Service Host. If a CAL package exists that is specific to the service, the Service Host downloads it immediately.
For example, if you select Cash Management, you must also select the Check And Posting service (CAPS) because the Enterprise Cash Management (ECM) module only runs on CAPS Service Hosts. This causes all Service Hosts that run CAPS to automatically download the ECM CAL package if a deployment schedule exists for the Enterprise or property.