How to change a closed ticket for the author of the request?

How to change a closed ticket for the author of the request?

Hi!
How to change a closed ticket for the author of the request?
Or suggest an option to reopen ticket without reply in the ticket like here - https://pitstop.manageengine.com/portal/en/kb/articles/to-reopen-resolved-ticket-by-requester-reply


                  New to ADSelfService Plus?