I am trying to get a new user connected to the exchange on SBS 2003 but I keep getting the message: "The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action." Or It says that the name can't be resolved. The other users connect to exchange fine. I put in the exchange server just like the other computers have it in the mail account settings. They are using a servername.domainname.local The computer has been formatted, the OS is XP Pro with all the latest updates 1. User can get to / log in to OWA. 2. I have ensured that the certificate is in the Trusted Root Authorities on the client machines. There are no certificate errors displayed. 3. I went through the Rpc/HTTPS set up documentation and confirmed that all settings, port numbers, registry entries, etc were correct. Users have no problem connecting to the Exchange server when starting Outlook remotely; the issue arises when they try to authenticate. The user can access all the files on the server so I know she connects to the domain correctly. I have searched and tried MANY different fixes but haven't found one that is a solution yet.