I have an issue with Auto Discover not letting half of my users use their Out Of Office tool through the outlook client. We host exchange through Rackspace, and they tried testing one of my failed users and they were able to use OOO just fine. We verified that DNS Auto discover is correct at Rackspace. They said the issue in on my LAN somewhere. The strange part is if I switch to my wifi connection, then OOO works for all the users that are having the problem. My wifi is plugged directly into my Cisco firewall on its own private subnet. We are very small so all the users on my LAN are in the same subnet, there is only one for about 15 people.
I tried plugging my RJ45 cable into the switch directly, and still I don't get though to Auto Discover and OOO. I am not sure where to check next to try and see what is going on.
My network is a Comcast Router, to a Cisco ASA 5512-X Firewall, to 2 Cisco 2960s switches (no VLANS)... Any help would be appreciated? Thx...