Entourage 2008 not working with exchange 2003 locally

I have entourage 2008 working with exchange 2003 using the OWA server address but only when I'm outside of the work network. When i am on the local office network it just says not connected?

Any got any experience working with this?

Thanks.

You probably need to enter the name of your mail box server instead of the owa drivers.
Try logging into OWA, click on Options and then on 'About' to see information about the Mailbox Server Name. If there is no About option, ask your Email Administrator (if you do not know who that is, email [email protected])