IT:AD:Visual Studio:HowTo:Configure the Proxy

The default is:

<system.net>
  <settings>
    <ipv6 enabled="true" />
  </settings>

Tried following, but it stopped Extension Manager from working behind Proxy.

<system.net>
  <settings>
    <ipv6 enabled="true" />
 <servicePointManager expect100Continue="false" />
  </settings>
  <defaultProxy 
    enabled="true" 
    useDefaultCredentials="true">
    <proxy usesystemdefault="True" />
 </defaultProxy>-->
 </system.net>