Available notifiers are shown in a table on the Notifiers page in the console. This page includes the default notifiers provided with the current Carbon Black App Control release and any notifiers you have added.
In addition, if you upgraded from a previous version of Bit9 Platform or Parity and modified any of the notifiers, both the current default and the modified version are listed in the Notifiers table. The first modified version of a v6.0.2 notifier has (custom 1) appended to the name, the second - (custom 2), etc.
You can edit any notifier shown on the page, but you cannot delete the default notifiers.