OK, so far so good. I have been running E2K7 fine for a few days now. I have been monitoring the logs and I get two warnings about the servers being the wrong version. Those are my 2 other Win2000 DC's, so I am fine with those warnings.I have an error that I need help on. It is "MSExchange RPC Over HTTP Autoconfig" Event ID: 2003It says the service is not installed or not properly configured. I have the service installed, but I am also running OWA without a valid certificate. Could this be the cause of the error?I will try re-installing RPC tonight.Jeff

You must also enable outlook anywhere, either with enable-outlookanywhere or from EMC

Make sure that you have installed RPC over HTTP proxy (a Windows component).This can be done from Add/Remove Programs --> Windows Components --> Network Services>RPC over HTTP Proxy.