I saw people ask questions on the forums regarding to “Could not establish trust relationship for the SSL/TLS secure channel with authority” while attempting to call the web service via a host domain name other than the one specified in Issue-To within the SSL certificate. Most likely you are using the same certificate for the WCF web services hosted on other domains, for example, development or demo server.
A custom remote certificate validation can be used to avoid the strict validation, instead, just make it trust anything.
In your code, simply make a call to the static method SetCertificatePolicy() once within your application before making any request to the web services.
// note this code is not intended to used
// in production enviroment
public static class Util
/// Sets the cert policy.
public static void SetCertificatePolicy()
/// Remotes the certificate validate.
private static bool RemoteCertificateValidate(
object sender, X509Certificate cert,
X509Chain chain, SslPolicyErrors error)
// trust any certificate!!!
System.Console.WriteLine("Warning, trust any certificate");