Hi, Can anyone has document which explains the MOM and SCOM monitored parameters thresholds ?

Hi Nope - sadly not. Sometimes the documentation that comes with the management pack will have that information. There is also an MPView utility which will allow you to extract that information for SCOM 2007. Some of this has been posted to OpsMgrJam but not all MPs are up to date: http://blogs.technet.com/b/mgoedtel/archive/2010/08/11/mpviewer-exports-on-opsmanjam-com.aspx Jonathan Almquist also has published this which will help with monitors: http://blogs.technet.com/b/jonathanalmquist/archive/2010/03/15/export-unit-monitors-including-thresholds.aspx Cheers Graham View OpsMgr tips and tricks at http://systemcentersolutions.wordpress.com/