Hi All
Long time watcher - first time poster 
We're in the process of setting up Jira for the first time and slowly going through best practices on how to set things up. I'm trying to find out access to Jira can be handled between different companies that also run Jira and have their own accounts and how they can access our Jira system with their own company accounts.
As the prime stakeholders in the project we have ownership over specific values such as dates, milestone deliveries, etc. that our clients need access to. Currently that is all handled by sharing such data and it being copied and replicated on individual systems. What I want to know is if there is a way that access to pages and data can be controlled from one Jira installation and essentially mirrored to another separate system and how could this be achieved.
Thanks
G