Enabling access to Qlik Sense SaaS only from Corporate laptops, mobile devices, and tablets, e.g. Iphone and Ipad.
An alternative is to use SSO for login where there is a certificate verification, however when that is not possible there is a problem.
Discussion thread: https://community.qlik.com/t5/Deployment-Management/Access-restricted-by-device/m-p/1955561#M22727