How to solve customer can comments on closed jira ticket

[adas1]

Once the ticket is closed, the service desk still allows the customer to enter comments and cause an SLA breach in jira project.

 Please note that I had to change the ticket status from Incident to Problem to stop the SLA (check the history) as, once the ticket is closed, I cannot make any changes to it.
how we can solve this issue?

[Mark Segall]

Hi @adas1 - You can add a property to your Closed status in the workflow:

• Key: jira.permission.comment.denied
• Value: (Leave Empty)

This will prevent anyone from adding comments when the status = Closed

[Roel Janken]

For me this didn't work.
I added the key to the property field in the workflow in the transition where the Closed status was defined. I saved the updated workflow and tested the flow. 
It failed.

What am I doing wrong or forgetting?

[Roel Janken]

I already answered my own question.

Please check https://confluence.atlassian.com/jirakb/how-to-restrict-jira-service-management-customer-to-comment-once-the-ticket-is-closed-1116289104.html