The AllowSystemSetup property controls whether a user can add staffing suppliers/employers in the system.
Config Option > User > User_UserSetting
True: User is allowed to add suppliers/employers, branches, users, and announcements. User can also manage permissions to reports and advanced queries.
False: User is not allowed to add suppliers/employers, branches, users, and announcements. "Add New" buttons for branch and user tabs in Admin Tools will be greyed out. User cannot manage permissions to reports and advanced queries.
If a user tries to add a supplier, a message is displayed saying "You are not allowed to Add New Staffing Supplier"
Where the setting is reflected...
Admin Tools > Employer, then right-click to Add New Staffing Supplier.