Exchange 2003 connection

Has somebody installed the connection with MS Exchange Server 2003? In the doc always is mention versions 2000 and 5.5 SP4, but no 2003.

I followed the Groupware Admin guide to install it but I got the following error when I execute the test:

MS Outlook is not configure for Corporate/Workgroup access.

But I am doing the test in the server where the MSX-A was deployed and of course no Outlook is installed there!

Could somebody offer me some help?