If you configure a dynamic mapping that uses data sources that are set to synchronize at run time, you can preview the run-time instance of the mapping to validate the synchronization. To preview the run-time instance of the mapping, view the mapping with resolved parameters. When you view the mapping with resolved parameters, the Developer tool generates a run-time instance of the mapping that reflects run-time changes in dynamic sources and targets. Validate the run-time mapping to validate data source synchronization.