Is it possible to provide WCF with a custom proxy address and custom credentials?
I\'ve found this answer on stackoverflow: How to set proxy with credentials to gen
The client credentials you're setting are fine in order to authenticate to your services.
For proxy authentication you need to use HttpTransportSecurity.ProxyCredentials.
This link might help you out.
http://msdn.microsoft.com/en-us/library/system.servicemodel.httptransportsecurity.proxycredentialtype.aspx