Question : Running BlackBerry Enterprise Server Express on a Different Server

I am running Exchange 2003 on windows 2003 Standard Server,
I would like to run BlackBerry Enterprise Server Express to connect my black berry users with ourExchange Server
Can BlackBerry Enterprise Server Express be added to a different server that doesn’t have exchange server on it

Answer : Running BlackBerry Enterprise Server Express on a Different Server

Yes it can.
You'll need to download and install the correct MAPI/CDO package; the installation guide provides instructions as to what you'll need to do to prepare the server for BES Express installation.