Trying to Authenticate to MS Exchange 2003

[Michael Prichard]

Hello All,

I am trying to authenticate to MS Exchange as follows:
                
                HttpClient client = new HttpClient();
		NTCredentials creds = new NTCredentials(_username, _password,  
"localhost", _domain);
                // set credentials for connection
		client.getState().setCredentials(new AuthScope(_exchangeServer,  
AuthScope.ANY_PORT, AuthScope.ANY_REALM), creds);
                GetMethod get = new GetMethod(prootPath);
                get.setDoAuthentication(true);
                status = client.executeMethod(get);
When I hit the server I get this back:

Jan 10, 2008 3:10:54 PM  
org.apache.commons.httpclient.auth.AuthChallengeProcessor  
selectAuthScheme
INFO: ntlm authentication scheme selected
Jan 10, 2008 3:10:54 PM  
org.apache.commons.httpclient.HttpMethodDirector processWWWAuthChallenge
INFO: Failure authenticating with NTLM <any  
realm>@mail.exchangeserver.com:443

I had it working with my internal test server but now when trying to  
connect to other servers I am getting Auth issues.  Ideas?

Thanks!
Michael