User sync happens by Lazy user importer in CQ. It creates user in Hybris if CQ user exists but not in Hybris and if Hybris user exists then it is imported into CQ. The synchronization happens in LazyUserImporter#postProcess() class which implements AuthenticationInfoPostProcessor
User sync happens by Lazy user importer in CQ. It creates user in Hybris if CQ user exists but not in Hybris and if Hybris user exists then it is imported into CQ. The synchronization happens in LazyUserImporter#postProcess() class which implements AuthenticationInfoPostProcessor