On the home page of the console, click Command Control.
In the navigation pane, click Account Groups.
In the details pane, select the account group that you want to delete and click the delete icon next to the account group name.
To select multiple account groups, click the top level account group and click Delete Multiple.
Click Delete. The selected account groups are deleted and are also removed from any other account groups, rule conditions, and script entities where they have been defined.