Hi, I try to use RPC OVER HTTP using SQUID as reverse proxy, I used the config sample on squid website, the result is that I have a prompt for the password, I entered the password and then I have an error saying that Exchange Server is unavaillable. When I watch the log on IIS, I see that the client is successfully asking for "https://url/rpc/rpcproxy.dll?...." using methods "RPC_IN_DATA" and "RPC_OUT_DATA". On squid I see in the access.log : "TCP_MISS/503 134 RPC_IN_DATA https://url/rpc/rpcproxy.dll? - FIRST_UP_PARENT/IP" Is someone have any idea of the problem ? Thank you very much. Best Regards, Xavier