6.4.4.8. System Set Manager ⇒ Channels —

To subscribe or unsubscribe the selected systems in any of the channels, toggle the appropriate radio buttons and click the Alter Subscriptions button. Keep in mind that subscribing to a channel uses a channel entitlement for each system in the selected group. If too few entitlements are available, some systems fail to subscribe. Systems must subscribe to a base channel before subscribing to a child channel.