Install the Root Certificate for All Browsers
To inspect web traffic, perform SSL decryption, or render a block page correctly when a browser on a user device attempts to visit a blocked HTTPS web site, install the Cisco Secure Access root certificate for each browser on the organization's user devices. User devices must have the Cisco Secure Client deployed with the Umbrella module.
Steps to perform the installation of certificates vary based on the operating system and browser type. For more information, see Install the Cisco Secure Access Root Certificate.