As a JSM administrator, you can enable Modify My Request from the project settings of any Jira Service Management project.
Enable Modify My Request
→ From Project configuration you can show Modify My Request button on the Customer portal for the specific Jira Service Management project by clicking on the Enable Modify My Request on Customer portal checkbox.
Edit Modify My Request on the portal
By enabling Modify My Request on the Customer portal, JSM Help Center customer can edit Summary and Description fields.
JSM Help Center customers can edit:
Summary
Description
Access and Permissions of Modify My Request
All portal requests can be edit with Modify My Request by:
Creator
Reporter
Project configuration: JSM Project administrator view
image: title → Modify My Request: Project configuration
Modify My Request: JSM Help Center Customer view