Once you've resolved a requester's support issue, you change the ticket status to Solved, using the Submit button as described above. This should mean that you're done with the ticket and that the requester is satisfied with the resolution you provided. However, a requester can reopen the ticket after being set to Solved by responding and adding a new comment.
After you set a ticket to Solved, the following status is Closed. However, you can't manually change a ticket to Closed; it is set to that status using a predefined business rule called automation.
The default automation setting is that a ticket is closed automatically 7 days after it has been solved.
After a ticket's status has changed to Closed, the requester can no longer reopen it. They can, however, create a follow-up request that references the original, now closed ticket. Agents can also create a follow-up for a closed ticket.