We have a cloud jira with all current issues. We used to be part of another server based jira and want to be able to read the history from that system. There are references to users in the old system that are not active anymore, and hence do not need an active user account in the cloud jira.
All issues in the server jira are closed, but we need to be able to search for specific issues to view comments and attachments.
What would be the best approach for this? Would it be possible to import everything (including attachments) into our cloud jira? Or would you recommend any other tool for viewing data exports from Jira?