You can configure the SCM proxy settings using the Proxy Configuration utility that was installed with the SCM.
To use the Proxy Configuration utility
Note: There are two types of configuration script, .PAC and .INS. The .PAC is a Proxy Auto-Config file which defines how web browsers and other user agents can automatically choose the appropriate proxy server (access method) for fetching a given URL. Whereas, the .INS (Internet Naming Service) locates IP addresses and names of computers on the Internet, often referred to as "name resolution" and translates the IP address into a name that is stored by the Windows Internet Naming Service.
As part of the proxy support, the PAC script is supported by SCM since it relates to the Proxy Configuration in the browser. Since INS and PAC are completely different from each other in their format, SCM is not able to understand the INS script if .INS is used as a Proxy Auto-Config file.
Presently the SCM does not support proxy configurations utilizing the Web Proxy Auto-Discovery Protocol (WPAD).