List of users who have subscription permissions to the channel. This tab appears on two conditions: First, the user must be an Organization Administrator or a Channel Administrator. Second, the Globally Subscribable checkbox on the Details tab must be unchecked, thereby making the channel subscribable by user. On this tab, select the checkboxes of the users to be allowed to subscribe systems to this channel and click Update. Note that Organization Administrators and Channel Administrators automatically have subscription access to all channels.