I am working with a Vendor to deliver a solution for a Govt department so there are 3 parties involved.
The Govt dept has given my team access to their Jira instance, but will not allow our Vendor to access it.
The Vendor has their own instance of Jira.
Is there a way to integrate the Vendor and Govt instances of Jira as I'd like to reduce the duplication of effort in raising and tracking defects.
Thanks for your help 
Jira Service Desk Application 3.3.0-OD