Hi ​@srinivasa gupta ,

I hope you are doing well. Sorry fro the delayed response.

Currently, it is not possible to restrict or disable the "Closed" status once a ticket has been set to it. However, a workaround would be to use an automation rule to monitor tickets that are updated to the "Closed" status as you can alter the status which is responsible for changing status when ticket is resolved. 

Please feel free to revert back to this thread in case you require any further assistance on this. 

Thank you !!

maybe setting up a business rule to limit the “Status” options if a ticket’s Status is Closed?

Edit: ya, it’s 2 step solution. As you can’t have a condition and action on the same field in a business rule, you need another value on the ticket as condition. So when a ticket is closed you have a workflow that sets a checkbox ( that is hidden from agents) and then you can disable the status field when it’s checked. 

ah i see, i didn’t know that was a thing - haven’t done much with business rules tbh