A list of all groups and configured attributes can be viewed on Manage groups page.
Access the page:
Log in as a user with the 'Jira Administrators' global permission.
Navigate to Admin menu → User management → Group Plus → Manage groups.
Search by text (case-sensitive) within the page is available.
Actions
Edit members - allows to add new people to the group or remove existing member(s).
Edit attributes - allows to edit the value of any configured attribute.
Edit managers - allows defining manager(s) for every group. Managing role can be assigned to a user or a group.
You can assign a non-admin user to be a manager of a particular group(s). Group manager has an access to the Manage groups page but can view only groups that he/she manages. Group manager can edit group members and attributes.