Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm in the process of setting up a company intranet. One of the requests is to do some intregration with Exchange Server 2007.

In my tests I can authenticate to EWS just fine using NetworkCredential, as long as I'm passing in my username and password. In our intranet, I'd like to pass on the credientials of the logged in user. We'll be using windows integrated authentication only.

I can't seem to get this working - setting the credentials in the ExchangeServiceBinding to CredentialCache.DefaultCredentials didn't work.

.net and IIS 6 from the web server Exchange 2007 on Windows 2003 server

Any ideas? Thanks.

share|improve this question
up vote 1 down vote accepted

It sounds like you are being bit by the NTLM double hop issue. Type setting up Keberos and having Windows use that to toss the credentials around. It should do the trick.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.