So I ran into this issue I needed to find out if SP2 was installed on a Exchange 2003 Server I was working on for a client. The issue was this server was a SBS (Small Business Server Edition) So when you clicked Help>About on Exchange Manager it only would give you 6.5.7638.1 and nothing about SP2 or anything.. After some research I found the following and figured I would share it.

Exchange 2003
6.5.6944 = Exchange 2003
6.5.7226 = Exchange 2003 SP1
6.5.7638 = Exchange 2003 SP2
6.5.7638.1 = Exchange 2003 SP2 + some Exchange Patches Installed

Exchange 2007
8.0.685.24 or 8.0.685.25 = Exchange 2007
8.1.0240.006 = Exchange 2007 SP1

So I got alot of complaints about the last layout being hard on the eyes.. Lets see if this one is any better.. Leave comments with feedback if you think anything should be changed or added. I wil still be fine tuning this template for the next week or so im sure..