When attempting to access HTTPS sites, a ProxySG returns "SSL untrusted issuer" message. This can occur if a ProxySG is unable to validate the web server certificate issuer.
A workaround for this issue is to Add a rule within the ProxySG Visual Policy Manager to bypass or not perform server certificate validation for all sites or just one site.
To Disable server certificate validation for all web sites in Explicit and Transparent proxy deployment:
To Disable server certificate validation for one website in Explicit and Transparent proxy mode: