Outlook with Exchange over HTTP

Exchange Server 2003 SP2
Windows 2003 Standard SP1
Outlook 2003

I'm trying to set up outlook to connect to Exchange from outside the office
over HTTP but can't seem to get it to work.

I have pretty much the default installation of Exchange. The complete
installation out Outlook 2003 on Windows XP Pro SP2 with all the updates
applied on all systems.

I've gone in to configure the email and checked "Connect to my Exchange
mailbox using HTTP."

When I get home at night, I tried to bring up outlook, and it tried to
connect but eventually showed as disconnected and no new mail showed up.

I guess I'm trying to determine what I'm doing wrong. I can connect fine
down at my office with the same configuration. I am using all public IP
addresses at my office. There is no firewall. At my house, I'm behind a
Netgear DSL Router using NAT. But I don't think that would cause me any
problems.

What I'm not sure of is if my ISP is blocking any ports.

So...my best guess on why it's not working is that the connection is too
slow or there are ports being blocked at my office that are essential to
making this work. Or maybe I didn't configure some element of Exchange to
make this work.

Does anyone have any suggestions?

Thank you,
Gary


.

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