A managed system group is a named collection of managed systems. When distributing a situation, policy, or historical collection configuration to managed systems, or when assigning managed systems to a custom Navigator view, you can specify a managed system group (or groups).
If the main toolbar has no 
Object group editor,
your user ID does not have View permission for managed system groups.
If you can open the editor, but the tools not enabled after you select
one of the managed system groups, your user ID does not have Modify
permission for managed system groups.