You may wonder if there's a feature to mass update the subject field on multiple tickets in Kayako Classic. This article provides the answer to this concern.
We are sorry to inform you that the feature to mass update the ticket subject on multiple tickets is currently not available and has been identified as a feature enhancement. We have conveyed the information to our product team already.
The only "mass action" available for you when updating multiple tickets at the moment are the following items:
For agents, follow the Submitting a Feature Request - Agent Guide if you received such a request from a customer.