Hi there. We're in the process of migrating from Freshdesk to JSM Premium and will be migrating all our existing tickets across. As part of that migration process, we will put the Freshdesk ticket ID into a custom field on the issue within JSM, so we have a record. The challenge we have is that once we go live on JSM, if any customer sends an email on a ticket that was originally opened in Freshdesk, then the subject line will have the Freshdesk ticket ID in it, not the JSM issue key, meaning that JSM will consider it a new ticket, rather than a reply to an existing open ticket (that was migrated).
Is there any way of considering these emails as replies to the tickets that are open in JSM via the migration, through some sort of automation rule or similar? I had hoped we could look to match the presence of the FD ticket ID in the subject line with the same value in the custom field of the JSM issue and use that to identify the issue to associate the email with, but I'm not sure if that will work or if there's a better option: I imagine this must be a common challenge for businesses where it is not possible to duel run on 2 ticket systems (as some of our tickets remain open a long time).
Any help/suggestions gratefully received!