Turning on Group Policy to configure a Web proxy

Log on to a server in the domain, and with administrative permissions, open up Start > Programs > Administrative Tools > Active Directory Users & Computers and expand your domain.

1.	Right click the top-level domain or Organizational Unit where the policy should be applied, selectProperties, then select the Group Policy tab.

2.	Create a GPO and give it a meaningful name (Cloud Web Security, for example).

3.	Edit the GPO from the following location. User configuration > Windows Settings > Internet Explorer Maintenance > Connection > Automatic Browser Configuration.

4.	Select Enable Automatic Configuration.

5.	Under Auto-proxy URL (.JS, .JVS, or .PAC file), enter the path to the PAC file.

6.

In the Automatically configure every field, specify how often the Web browser should query for the auto-configuration. For example, if you enter 240 minutes, every 4 hours the Web browser checks for an updated PAC file. If you leave this field blank or set it to "0", the Web browser is only configured when it is started.

7.	Once the configuration is complete, click OK.

Web clients using Internet Explorer pick up the settings in this GPO the next time that group policy refreshes, which by default is every 90 minutes for clients and every 5 minutes for Domain Controllers (or the next time a user logs off and on again). You can change the refresh interval in the default domain policy, or by going to a particular client and entering the following at a command prompt:

gpupdate /force