At one of our larger sites we've started experiencing a major issue with one of our collaborative web servers in that piles of users whose systems have automatically updated to Internet Explorer 10 are not adding the sites we've deployed via group policy to the proxy exceptions to their proxy exceptions (Internet Options | Connections | LAN settings | Advanced).
So basically we deploy a number of subnets and domain names to our proxy exceptions list and after our support center blew up with calls concerning random issues, I had the admins compile a list of affected and unaffected systems contrasting various items and we noticed the one similarity was Internet Explorer 10. Thousands of unaffected systems have Internet Explorer 8 / 9 while all those affected have Internet Explorer 10.
Is there a new way to deploy proxy exceptions? We thought about forcing them down via registry keys but felt there must be a less obtrusive method and maybe something is wrong.