Hi all After I removed HubTransport Role, I cannot reinstall again and prompt a error message "An error occurred. error code was 2147950640 message was There is no such object on the server.." Please Help ??? Thanks all

Hi, Why did you remove it and how?? Look in the exchange setup log located in a folder in the root of the C drive to see what the setup program feels is missing. Leif

Sorry all I found the problem on myself The PDC role must be on w2k3 sp1 Thanks