Discover Customization Specifications activity The Discover Customization Specifications activity talks to vCenter to retrieve guest customization specifications that can be used for VM provisioning. If a spec_name is specified, the system only looks up that specification. If no spec_name is specified, all customization specifications are discovered. Table 1. Input variables Field Desciption vCenter IP address of the vCenter server that manages the virtual machine to check. Specification Name Name of the specification to discover. If this field is blank, all specs are discovered. Sensor script Script that processes the vCenter address and specifications returned by the activity.