We have been using DHCP option 252 to provide details of the WPAD.DAT file for proxy auto config for the past 4 years and it has been working well. We recently upgraded (replaced) out DC from an old W2k3 server to a 2008 R2 server. The DHCP options were identical as we exported them from the one server and imported them to the new server, but since the change over we have not been able to go proxy auto config to work. The clients (combination of XP and Win7) don’t even seem to be trying to access the file. It appears that the DC is not providing the details to the clients.
Has anyone got proxy auto config working with a 2008 R2 DHCP server? I have been working on this for a couple of weeks and we know the web server side is working fine. I have tried removing option 252 and recreating it, but that does not help.
Any ideas?
Steve