I have inherited an NT4/Exchange 5.5 network with one server which is used as a file, mail and database server for 30 internal users and an external membership of 5000 who utilise our web services. Our websites are hosted externally but members log-ins are verified against data held locally. I have purchased a second server (they are both Dell Poweredge 1650 with loads of failover), and I have just ordered Win2k server, Exchange 2k and ISA server. I have seen and heard many ways to configure services and applications accross the 2 servers but wondered if anyone had any ideas, advice or experiences they could share?