I have an end user who connects to our exchange 03 server through outlook 03. He cannot connect to our exchange server. His OWA works fine inside and outside of the network. I have flushed the dns, took the outlook account out of cache mode and back into cache mode. Nothing seems to help, I also noticed he had a sync conflict folder in outlook with over 4000 messages, mostly calendar and contact issues. These were resolved and deleted. Not sure what to do next, I dont really want to uninstall and reinstall Outlook any other suggestions.