I am testing the Microsoft Exchange Web Service Java API (version 1.2) to read mails from a server. Here is my code:
String url = "https://my-server/EWS/exchange.asmx";
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
service.setTraceEnabled(true);
service.setCredentials(new WebCredentials("user", "password"));
service.setUrl(url.toURI());
Mailbox mailbox = new Mailbox("foo@bar.com");
FolderId folder = new FolderId(WellKnownFolderName.Inbox, mailbox);
ItemView view = new ItemView(10);
view.getOrderBy().add(ItemSchema.DateTimeReceived, SortDirection.Descending);
FindItemsResults<Item> items = service.findItems(folder, view);
Unfortunately, this code throws the following error:
Exception in thread "main" microsoft.exchange.webservices.data.EWSHttpException: Connection not established
at microsoft.exchange.webservices.data.HttpClientWebRequest.throwIfConnIsNull(Unknown Source)
at microsoft.exchange.webservices.data.HttpClientWebRequest.getResponseCode(Unknown Source)
at microsoft.exchange.webservices.data.EwsUtilities.formatHttpResponseHeaders(Unknown Source)
at microsoft.exchange.webservices.data.ExchangeServiceBase.traceHttpResponseHeaders(Unknown Source)
at microsoft.exchange.webservices.data.ExchangeServiceBase.processHttpResponseHeaders(Unknown Source)
at microsoft.exchange.webservices.data.SimpleServiceRequestBase.internalExecute(Unknown Source)
at microsoft.exchange.webservices.data.MultiResponseServiceRequest.execute(Unknown Source)
at microsoft.exchange.webservices.data.ExchangeService.findItems(Unknown Source)
at microsoft.exchange.webservices.data.ExchangeService.findItems(Unknown Source)
at foo.bar.TestMail.main(TestMail.java:52)
I’m not able to understand what is wrong with the current code. Do you have any clue, or at least some tests to try?
Note that the web-service (https//my-server/exchange.asmx) is accessible to my Java code.
Not sure if it can help, but I’ve found that in the traces displayed by the logs:
<Trace Tag="EwsResponse" Tid="1" Time="2013-01-28 10:47:03Z">
<html><head><title>Error</title></head><body>The function requested is not supported
</body></html>
</Trace>
EDIT
I’ve made another test. This time, I use the defaults credentials – so my own email account – using service.setUseDefaultCredentials(true); instead of setting the WebCredentials object. The connection is still not established, but I get another error (I’ve took only the interesting part of the trace log):
<h1>You are not authorized to view this page</h1>
You do not have permission to view this directory or page using the credentials that you supplied because your Web browser is sending a WWW-Authenticate header field that the Web server is not configured to accept.
(...)
<h2>HTTP Error 401.2 - Unauthorized: Access is denied due to server configuration.<br>Internet Information Services (IIS)</h2>
Of course, I can’t access nor change anything on the Exchange server side. Is there a way to make the authentication successful?
The problem is due to the authentication scheme used. By default, EWS uses NTLM, but my Exchange server is not configured to accept this kind of authentication. I have to use LDAP authentication.