Error:
You must update your Windows Small Business Server 2008 settings both before and after you install Exchange Server 2007 Service Pack 2 (SP2). Before installing SP2 for Exchange Server 2007, read the detailed information at http://go.microsoft.com/fwlink/?LinkId=155135.
http://support.microsoft.com/?kbid=974271
At last, a installation too for easy install of Exchange 2007 SP2 for SBS 2008, no more “hacking” the sbs 2008 server…
Great News, Enjoy !