We have an exchange OWA set up and is accessible over the intenet. Internally we created a DNS entry that will also point to the OWA from the inside at the same address. Everything works perfectly except for 4 laptops that have VISTA loaded on them. When accessing from the internet IE give a DNS error that it can not find the server. I downloaded Firefox on the machine and the URL works fine and OWA is accessible. Doing a NSlookup from my laptop the Ip is also found correctly. IE 7 will just not connect. Users that have Windows XP loaded work correctly. My laptop is a member of our domain. Any suggestions on how to troubleshoot this problem would be greatly appreciated.