Hi Stefano, The reason you are getting the certificate errors is because all of the internal pages the appliance stores are on an https server. for example, the block page, captive portal, policy violation and other warning pages. so the appliance presents its certificate so that it can show you the warning page. In the case of https scanning then every https page would present the user with the appliance certificate. All sites would also appear to be signed by the Sophos PLC. In either case it's best to push out the appliance certificate via gpo to avoid all of the ssl warnings.
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