Hey there! Author here. We&#x27;ve got instructions for working out which root store you&#x27;re using (it&#x27;s based on your OS and browser) and instructions for configuring the major root stores: OS X, Windows, Firefox and Android.<p>We weren&#x27;t able to identify a way to disable inbuilt certificates on iOS 9 - Apple Configurator 2 only allows the addition of certificates. If the HN community knows of a mechanism to do this, let us know and we&#x27;ll update the article and credit you.