Hi All, We have ISA server and have already one exchange server behind it, it is set to receive E_mails for one domain. We now have another partnet company that is co-located on the same premises and we would like to share the internet bandwidth for incoming mails, they are going to be using a Lotus Domino server. We have 8 IP addresses available between us, one is used for the router inside interface, second IP address is for the external interface of the ISA, and this is the IP address also being used for all outgoing web traffic, and also the static NAT for the exchange server. Can I add one of the free global IP address to the external interface of the ISA server, and then assign it to be used for the Lotus Domino server for the partner company. For example... Router inside interface is connected to a small switch, we also have the ISa external interface on the same switch. They are using say, 211.243.232.9 (Router) and 211.243.232.10 (ISA). The ISA is configured to point 211.243.232.10 to the exchange server's internal Private IP address. We have 4 more ip addresses that we can use on this subnet, say for instance 211.243.232.11 -> 211.243.232.14. My question is, for us to be able to add and use an additional domino mail server behind the ISA, can I add the other IP addresses on the external interface and then bind one of the external IP to the internal IP of the lotus domino mail server...?? Pleas help