I am in the process of upgrading our MS SBS 2K server to SBS2K3, and on our SBS 2K server we have BES 3.6 for Small Business installed with 7 Users. I dont have the budget to purchase an additional Server license just for BES, and it appears that the 4.1 Express install can go onto the SBS2K3 box without issue.

2 questions:
Is it accurate to say that 4.1Ex will go onto the SBS2k3 box?
Will I be able to use the CALs from my existing 3.6 installation on the 4.1 Express installation? I purchased 2 of them recently, and they were technically 4.1 CALs, so I am assuming those will be fine, but what about the base 5 that came with 3.6 SmBus?

I am not trying to avoid proper channels, I just need to know how ot provision for this upgrade ahead of time, so that I am not stuck with users unable to get their email while I wait for new CALs to arrive...

Thanks!

I got a response from RIM on the licensing issue:

BES Small Business 3.6 CALs are 100% compatible with 4.1.1 Express with no licensing issues whatsoever.