To configure web proxy authentication:
- Select Network from the Preferences menu.
- Choose one of the following:
- No Proxy to disable use of the web proxy.
- System proxy settings to use OS X or Windows settings for proxy configuration.
- A Change System Proxy Settings link appears if you wish to edit Network system preferences.
- Manual proxy settings to enter a host, port, username and password.
- If already signed in, you must sign out and sign back in for the settings to take effect.