Connection Sharing Problem - any suggestions

[Sailrace]

Guys - i need some help.

I can use the ICS on sprint to get my laptop connected to the internet with no problems.

I can then use the VPN on my laptop to connect to my work file server. Again, great, no problems.

However, when i try to connect to Exchange via outlook on my Laptop, it can't connect. I can get email through Pocket Outlook on the phone, and everything else seems to work fine, but connecting to Exchange through the ICS doesn't seem to give me any love.

Now, the strange thing - i thought maybe it was sprint, but i used a friends aircard, and it connects no problem. i used to us dial up networking on my old phone, and it worked too. So, i'm at a loss. Why would ICS not allow me to connect to our exchange server? And are there any suggestions out there for something i could try?

Is there a USB modem driver i could us to just try a regular dial up network connection?

Any help would be really appreciated.

Thanks

[Sailrace]

Nobody has any ideas here?