Exchange Web Services - The response received from the service didn't contain valid XML
Solution 1
I was experiencing the same issue as described in the following forum post: http://social.technet.microsoft.com/Forums/en-US/exchangesvrdevelopment/thread/e54c217f-28ff-4626-8ce8-a1242081f4d1/
(Essentially extra characters were being pre-pended and appended to the xml returned causing the error above)
If its any help - deleting and re-creating EWS virtual directory did not alleviate the problem.
I believe that perhaps our F5 load balancer or some intermediary device is inserting extra characters at the beginning or end of the XML.
When I changed my code to: service.Url = new Uri("https://192.168.x.x/EWS/Exchange.asmx");
(Essentially using the internal IP address of our exchange server) the request worked just fine. So something outside of exchange is mangling the XML.
Solution 2
service.Url = new Uri("https://mail.tencent.com/EWS/Exchange.asmx");
Details info is here: c# programmatically reading emails from the Exchange server
Brad
Updated on June 04, 2022Comments
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Brad almost 2 years
I am attempting to connect to exchange web services (ews) on a exchange 2010 server. Here is the code I am using:
using System; using System.Collections.Generic; using System.Text; using Microsoft.Exchange.WebServices.Data; namespace NDR_Processor { class Program { static void Main(string[] args) { ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP1); service.Credentials = new System.Net.NetworkCredential("redacted", "redacted", "redacted"); service.Url = new Uri("https://exchange.redacted.net/EWS/Exchange.asmx"); System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate { return true; }; FindItemsResults<Item> findResults = service.FindItems(WellKnownFolderName.Inbox, new ItemView(1000)); foreach (Item item in findResults.Items) { Console.WriteLine(item.Subject); Console.WriteLine(item.Body); } } } }
However in doing so I get an error stating "The response received from the service didn't contain valid XML.". The inner exception indicates: {"Data at the root level is invalid. Line 1, position 1."}
I've tried hitting https://exchange.redacted.net/EWS/Exchange.asmx in a web browser, it prompts me to login and then I am presented with a valid XML document as far as I can tell. So I am at a loss as to why my application is choking.
Does anyone have any ideas for why this might be happening or how I can solve it?
Thanks Brad