EFW2.3 autoconfig proxy settings ISSUE!!! PLZ HELP

[Guest]

[mithun]

 outgoing firewall on my EFW2.3 has ports 80 and 443 blocked to force the use of proxy on my network. Till now we have been using manually configured slient Useragents for the proxy. But now there are a few laptops that need to connect to the internet. configuring the manual proxy settings on the client browser is a problem as they have to use it outside our network on mobile and wifi spots aswell.

I tried the autoconfig settings but does not seem to be working. my clients UA's are not being configured automatically.

ANy help is appreciated.

PS: I use the dhcp and DNs on my firewall on my network.

Thanks in advance,
Mithun