How to check the result of Demo Migration in Jira Service Desk?

Our service performs the Demo Migration to Jira in a different way. Because of certain peculiarities of the platform, you won't be able to just go through Ticket IDs. Once Demo the is finished, you should download the JSON file which contains your Tickets and related data:

Then, import the files into Jira Service Desk, following this instruction.  The import process shouldn't take too long. Once the files were imported, give it some time since Jira Service Desk does not show Attachments and Comments right away, and then check the result of the migration altogether.