3CX V16, Update 5 Hotfix
Due to a chain of events, a Debian 9 root certificate was removed in the latest library package of ca-certificates. Apple Inc. uses this root certificate for many of their services, one of them being the notification system (APNS). With the removal of this certificate, the trust between the operating system and the service is broken resulting in the failure to deliver chat messages and calls to iOS-based devices. To note: The latest version 3CX iOS app has no reported performance...