Hello all, I'm desperate! I have moved a back end server with no mailboxes on it to the DMZ and configured it as a front end server. It is in front of a the firewall. I had it working so that it would not authenticate but get that internally. It actually was working for a few days and now it doesn't. I get a 404 page cannot be found error. I am testing inside and used to be able to type http://servername/exchange in get an authentication and get in but now it is not working. any ideas?