We have a jira system with 5 users who are all developers and can access all tickets in our system. Our system is entirely private.
We have a 3rd party (another company) who also has a jira system which is also private to their own company.
We want one of the users from the 3rd party to be able to access specific tickets in our private system only. Eg whitelist/allow access on a per ticket basis to this one specific user.
The other user is licensed, but we don't manage the license.
I am open to paying for another license for this one user providing I can restrict their access to specific tickets only.
How can we allow this for intercompany collaboration?
We don't want to make a new shared project.
Edit: Does Atlassian have a paid support service where we can basically pay an hourly rate for someone to remote in and walk us through doing this efficiently and safely? We would be more than happy to outsource it.