Final answer:
To enable the Follow the sun field on the Customer Service Case form, the 'com.snc.csm_time_recording' plugin must be activated in ServiceNow.
Step-by-step explanation:
To enable the Follow the sun field on the Customer Service Case form in ServiceNow, the plugin 'com.snc.csm_time_recording' needs to be activated. Once the plugin is activated, you can add the field to the case form layout if it is not already present. This addition can be done through the form designer or through the table dictionary by an administrator with the necessary permissions to modify form layouts.