Hi Hugo Human try the below code string dnsName = ConfigurationSettings.AppSettings["DnsName"]; if (string.IsNullOrEmpty(dnsName)) throw new Exception("Invalid Configuration for Dns Name"); Uri uri = new Uri(url); AddressHeader ah = AddressHeader.CreateAddressHeader("SomeName", url, 1); EndpointIdentity identity = EndpointIdentity.CreateDnsIdentity(dnsName); endpointAddress = new EndpointAddress(uri, identity, new AddressHeader[] { ah });