I have an Exchange 2003 Server that is setup for RPC over HTTP. It has been working just fine but today no users can connect anymore via Outlook. Now the Exchange server is running and seems to be fine. People can access e-mail if they connect via VPN or via Webmail. My question is....What services should i check or what is the best way to trouble shoot? Not sure what services are used for this and would like to fix without a restart if possible. Thanks. for the help.