Need Help with Exchange Install - Windows Server 2003 for SBS

Hello,

I was asked by a client to set up Exchange Server on a PowerEdge server running Windows Server 2003 for SBS. It appeared that Exchaneg was not actually installed, and was told that the server OS had been reinstalled previously. My assumption is that the person installing opted to not include Exchange as it was not being used at the time.

I located what i believe are the original Dell install disks and located Exchange Server on "Disk 2".  When I run the install i am prompted for a 25 digit license code. I do not have the license code, and don't believe there is one! There is no way to progress through the installation without a license key.

I am completely stumped as to how to add Exchange back to this server!  Since Exchange is included with Server 2003 for SBS, how do I proceed?!

This is time sensitive and ANY help would be much appreciated!

Regards,

Don