At MMS I had a request to re-blog this as a specific topic to make it easier to find. Specifically the question was asked how to configure OpsMgr to allow more than 10 objects to be selected to perform a task (or run a report) on. The following is a subset from: http://blogs.technet.com/b/operationsmgr/archive/2008/11/11/opsmgr-2007-registry-keys-to-control-the-refresh-of-the-admin-console.aspx
Registry Key to control the number of objects to fetch Tasks/Reports:
HKEY_CURRENT_USER\Software\Microsoft\Microsoft Operations Manager\3.0\Console
-1 (xFFFFFF) : unlimited number of objects allowed to be selected for fetching tasks/reports
0 : tasks/reports are not going to be populated for selected items in the view
Integer value > 0 : maximum number of simultaneously selected objects for which tasks/reports are going to be generated. The default value is set to 10
I had previously used this information in my article on quick ways to run reports from OpsMgr available at: https://www.catapultsystems.com/cfuller/archive/2010/08/04/quicktricks-creating-really-easy-multiple-server-performance-reports-amp-how-to-create-a-report-for-multiple-objects-when-you-don%E2%80%99t-know-what-objects-to-choose.aspx
Thank you to Eric (and others) who asked for this – great meeting you all at MMS!