We got a customer with 10 machines that their com test fails with a 200A error. The company IT is using a program called Zscaler as from my understanding is a cloud firewall/kind of proxy server. It's not a traditional proxy server as they allow their devices through via the Zscaler program for Internet access but none of their Canon devices shows up within Zscaler. Anyone out there run into a customer using Zscaler and got a com test to work? Everything they use for scan and print is all hosted locally on their Intranet so the copiers are fine within their network, they just can't add these machines to pass through their Zscaler.