Is There a Way to View a List of Users And/or Contacts Who Have Blocked the Caller ID Phone Number Used for Everbridge Notifications?
No. There is no way to view a list of users and/or contacts that have blocked the caller ID phone number used for Everbridge notifications. This is because there is no clear mechanism from the phone carrier that notifies us that the call has been blocked. An indicator that the recipient may have blocked the caller ID used for Everbridge notifications is that the notification delivery details show a call was placed to this contact, yet they report not receiving any call.
If a recipient has opted out of receiving messages from Everbridge but has not blocked the caller ID, the Unsubscribe Requests quick report can be used to view a list of such recipients. This report displays a list of recipients that have responded STOP to an SMS message or unsubscribed from voice notifications (if configured). More information on this report can be found here: EBS: Viewing Unsubscribe or Opt-Out Requests in Everbridge Suite