http://blogs.technet.com/b/sbs/archive/2010/01/14/exchange-server-2007-service-pack-2-installation-tool-for-sbs-2008-released.aspx[ Today’s post comes to us courtesy of Chris Puckett] When you try to install Exchange Server 2007 Service Pack 2 (SP2) on a server that is running Windows Small Business Server 2008, the installation process does not start, and you receive the followingen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/sbs/archive/2010/01/14/exchange-server-2007-service-pack-2-installation-tool-for-sbs-2008-released.aspx#3307352Thu, 21 Jan 2010 17:31:31 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3307352ppo insurance plans<p>We recommend that you perform a full backup of the data on the computer that is running Windows Small Business Server 2008 before you install Exchange Server 2007 SP2. The reason for the backup is that you cannot uninstall Exchange Server 2007 SP2.</p><div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3307352" width="1" height="1">http://blogs.technet.com/b/sbs/archive/2010/01/14/exchange-server-2007-service-pack-2-installation-tool-for-sbs-2008-released.aspx#3306010Fri, 15 Jan 2010 18:17:19 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3306010George<p>Thank you for the post. FYI, it appears that MSI Installer 4.5 package will not install on my SBS 2008 system. I'm not sure if it is already there or not(maybe it isn't even required), but I get an error message when I try to install it saying, &quot;The package does not apply to your system.&quot;</p><div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3306010" width="1" height="1">