The remote server returned an error: (440) Login Timeout.

Thanks for reply

I have checked the credential by login manually. It is working fine.

Hi Jitendra

Here is my code. I am getting error on line in bold.

ExchangeService service = new ExchangeService();
service.Credentials = new NetworkCredential("xxxxx", "xxxx");
service.Url = new Uri("https://xxxxxx/owa/Exchange.asmx");


ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(delegate { return true; });

AuthenticateSecureOWA("mail.abc.com", "abc.com", "xxxxx", "xxxx");

ItemView IView = new ItemView(10);

service.FindItems("Inbox", IView);


Thanks

Reasons:

You didn't establish a connection to the mail server.
You didn't establish a connection to the actual server.

Link1: Click Here

Link 2: Click Here