I need some help using Exchange EWS with C#

turbosupramk3

With this code I keep receiving the error message saying : "

The request failed. The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.

" Does anyone have any ideas on how I can get my C# program to send emails via EWS in my Exchange environment? Thanks

using System.Net;
using System.Net.Mail;
using Microsoft.Exchange.WebServices;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;

    private void emailNotifyUser ()
    {

Microsoft.Exchange.WebServices.Data.ExchangeService service = new Microsoft.Exchange.WebServices.Data.ExchangeService(Microsoft.Exchange.WebServices.Data.ExchangeVersion.Exchange2010_SP1);
service.Credentials =
new Microsoft.Exchange.WebServices.Data.WebCredentials("you@you.com", "password1", "domain.com);
service.TraceEnabled = true;
service.TraceFlags = Microsoft.Exchange.WebServices.Data.TraceFlags.All;
service.Url = new Uri("HTTPS://xxxxxxx/EWS/Exchange.asmx"); // https://xxxxxxx.xxx/autodiscover/autodiscover.xml
//service.AutodiscoverUrl(To,
// RedirectionUrlValidationCallback);
//ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback
//(
// delegate { return true; }
//);
// trust sender
//System.Net.ServicePointManager.ServerCertificateValidationCallback
// = ((sender, cert, chain, errors) => cert.Subject.Contains("nsc-cas-01"));
ServicePointManager.ServerCertificateValidationCallback += new System.Net.Security.RemoteCertificateValidationCallback(ValidateRemoteCertificate);
Microsoft.Exchange.WebServices.Data.EmailMessage email = new Microsoft.Exchange.WebServices.Data.EmailMessage(service);
email.ToRecipients.Add(To);
email.Subject = "HelloWorld";
email.Body = new Microsoft.Exchange.WebServices.Data.MessageBody("First email using EWS Managed API");
email.Body.BodyType = Microsoft.Exchange.WebServices.Data.BodyType.HTML;
email.Send();
}

private static bool ValidateRemoteCertificate(object sender, X509Certificate cert, X509Chain chain, System.Net.Security.SslPolicyErrors poli

Dave Kreskowiak

Does the code work if you just return true from the ValidateRemoteCertificate method no matter what?

A guide to posting questions on CodeProject

Click this: Asking questions is a skill. Seriously, do it.
Dave Kreskowiak

turbosupramk3

I will try that tomorrow. Is it as simple as just setting it to true?

Dave Kreskowiak

I have no idea. This is just a test to narrow down the problem.

A guide to posting questions on CodeProject

Click this: Asking questions is a skill. Seriously, do it.
Dave Kreskowiak

turbosupramk3

It does not work, I received the following error

An element node 'soap:Envelope' of the type Element was expected, but node 'Autodiscover' of type Element was found.

turbosupramk3

I double checked my autodiscover url with the following code and then matching that fixed it

Get-WebServicesVirtualDirectory |fl identity,internalurl,externalurl

Thanks for helping me to get that error and point me in the right direction!