Which type of message in the Equipment Management inbox must be deleted manually by the user?

The type of message in the Equipment Management inbox that must be deleted manually by the user is the advisory notice. Advisory notices are typically informational in nature and are intended to provide updates or recommendations regarding equipment management. Since they serve to inform the user rather than to prompt immediate action or compliance, they do not have an automatic deletion process. This allows users to keep useful information available for reference until they determine that it is no longer necessary, at which point they can manually delete it.

In contrast, other types of messages like update notifications, policy changes, and reminder notices often have built-in mechanisms for handling them, such as automated deletion or prompts for action. These types of messages are typically linked to specific actions that may need to be performed, therefore they are managed differently within the system.