The external access QR codes are associated with individual Premises and not Organisations so the set up page is accessed through the Premises menu. Select Manage > External Access to bring up the setting page. Details of each of the functions of the External Access can be found here Using External Access (QR codes)
“Pre-Printed” Option
When you receive your QR code(s) you will need to assign them to your premises, if you haven’t received your QR code(s) you can order them (available here) . Please follow the steps below to assign them to Premises.