You need to exempt traffic from SSL interception. For example, banking and healthcare sites are often exempted for compliance reasons.
To add a destination or source to SSL Interception Exemptions:
NOTE: After they are added to the list, the Web Security Service will not intercept traffic from these sources or to these destinations. Currently, traffic sent from a mobile device (iOS or Android) is always exempt from SSL Interception.
By adding SSL Interception Exemptions, you understand and acknowledged that Web Security Service will NOT intercept traffic that matches these conditions.