If a web application is secured by DualShield with Device Certificate Authentication, then a device will not be allowed to access the web application until the device is registered in the DualShield server in the user's account and the corresponding certificate is installed on the device.
If the device is a Windows device, then users will be able to register their devices and install certificates automatically using the web application or the self-service console.
If the device is not a Windows device, such as Mac OS, iOS and Android, then users will have to deploy device certificates manually using the self-service console.