Hi, I have Outllook 2003, Exchange 2003, Windows 2003. I have installed and configured the RPC over HTTP on the server. I have tested it by going to https://servername.domain.com/rpc and get the expected results. I have configured outlook 2003 to connect via HTTP on slow and fast. However, when I start it, it always connects via TCP/IP. Any suggestions of where to look? Tony