System groups are lists of systems with common sets of authorizations. Using system groups enables you to define a single set of authorizations that applies to all member systems in the group. The All Managed Systems systems group contains every managed system except the central management server (CMS). The CMS is excluded so that users are not mistakenly assigned the authorization to manage the CMS system itself. However, there is a CMS group created explicitly for the CMS and this group cannot be edited or deleted.
The System Groups tab provides you with the following options: