Has anyone on here tried running an exchange instant messanger server behind and e-smith gateway.
I know, you ask me why would I even do it. Well it's not for me, the person it's for already paid for the software and the CAL's so they want to use it. But I talked them into putting up a gateway for their e-mail etc.
But does anyone know what ports I may need to open if any and if I need to set up any DNS entries etc.

Thanks for the help guys.