Configuring Outlook via ISA to use Exch5

Hi,

I’ve this setup. Here in local office. W2k Domain with NT, W2k & win98 clients. We have DialUp as W2k member Server with ISA 2000 on it. Office XP is installed on all clients.

In our head office we have Exchange 5.5 with our accounts configured. We are accessing mails using OWA.

Now I want to configure outlook to download the mails Via ISA from our head office Exch 5.5 server. I’m having difficulties in it. Plz suggest your thoughts /opinions.