You can search and add users by name or email as shown in the screenshot below
You can use this option if you want to add all the WordPress users who have the similar domain name.
Using this option you can import all the WordPress users into Staff, in a single click.
You can give roles to all these new staff members. The Helpdesk roles are somewhat similar to WordPress roles. (Refer 10. Staff and Roles for details)
Admin - Can manage all tickets and Helpdesk settings.
Editor - Can manage all the tickets. No access to settings.
Author - Can manage only the tickets assigned to them. No access to settings.