By default, all project administrators have access to Backbone. If you want to allow only certain project administrators to access the Backbone configuration (create new synchronizations, editing existing synchronizations, etc. ) you can do so by configuring a list of allowed user-groups.

To create a list of allowed user-groups, follow these steps:

  1. Go to manage apps > settings (under Backbone Issue Sync)
  2. Disable the option "All project administrators are enabled to configure synchronizations"
  3. Select the allowed user-groups by searching in the select field and adding them

Now, only project administrators who are part of any of the allowed user-groups will be able to access the Backbone configuration.  

Jira system administrators will always have access to Backbone configurations. You can also restricts Backbone usage to certain projects.