When adding any domains to the Customized Domain section, you will not need to include “http://” or “https://”. Please try adding the domains like this:
Thanks Zac, figured that part out now and the sites were all accepted by the web GUI. I clicked save and applied the changes… However, we still noticed one of the PCs on the network picked up an update. Very frustrating! Do you happen to know if there’s anything else we’d need to add in to avoid windows updates? I’m going to use wireshark to test the activity and figure out what’s getting through, but was just wondering if yourself or anyone else out there in the community knows how to stop these?? Thanks!