A common requirement is to redirect users who type http://mail.company.com to http://mail.company.com/exchange. I used to do this on the front-end server using a default.asp with response.redirect or something similar. ISA 2004 has to allow the http traffic to the LAN in order to achieve this.
In an article on isaserver.org, it is shown how to do this in ISA 2004. This is a better and cleaner approach.
Basically, in the web publishing rule, set the paths as follows:

The external path / is redirected to /Exchange. The extra \ at the end tricks ISA into allowing the /exchange path to be used a second time. Without the \, it would conflict with the first path. Nice trick!



