http://blogs.technet.com/b/configurationmgr/archive/2010/01/05/the-configuration-manager-service-pack-install-guide.aspxThis document was created to help in troubleshooting Configuration Manager Service Pack 2 (SP2) install failures. This document is not entirely specific to Service Pack 2 and can apply to Service Pack 1 installs, upgrades from SMS 2003 to SCCM, and futureen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/configurationmgr/archive/2010/01/05/the-configuration-manager-service-pack-install-guide.aspx#3415932Fri, 25 Mar 2011 07:26:04 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3415932Raj<p>The client is running with SP2 in test lab environment, &nbsp;can I connect SP2 Clients to PRODUCTION SCCM SP1 server? will it work? is it advicable?</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3415932" width="1" height="1">