学习EWS Managed API,碰到 The Autodiscover service could not be located.的错误,不知道是什么原因。代码如下(从msdn上copy的):
try 
            {
               // Connect to Exchange Web Services as user1 at contoso.com.
               ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
               service.Credentials = new WebCredentials("user1", "password", "contoso.com");
               service.AutodiscoverUrl("[email protected]");               // Create the e-mail message, set its properties, and send it to [email protected], saving a copy to the Sent Items folder. 
               EmailMessage message = new EmailMessage(service);
               message.Subject = "Interesting";
               message.Body = "The proposition has been considered."; 
               message.ToRecipients.Add("[email protected]");
               message.SendAndSaveCopy();               // Write confirmation message to console window.
               Console.WriteLine("Message sent!");
               Console.ReadLine();
            }
            catch (Exception ex)
            {
               Console.WriteLine("Error: " + ex.Message);
               Console.ReadLine();
            }
请高手赐教,万分感谢