Which of the following would not be considered an element of User Business Continuity?

Voicemail retrieval is not considered an element of User Business Continuity because it focuses primarily on ensuring that users can maintain their communication capabilities and access to services while they are unavailable or facing interruptions. The other options, such as call forwarding when busy, call forwarding on unregistered devices, and call forwarding when away, are all mechanisms that directly facilitate continuity in communication by allowing calls to be rerouted or forwarded to ensure that important calls are not missed.

In contrast, voicemail is a service designed for receiving messages when the user is unable to take a call. While it plays a role in overall communication, it does not actively maintain the flow of communication during a disruption, which is the main objective of business continuity solutions. Therefore, it does not directly contribute to the strategies that keep communication open during instances when a user may be unavailable.