What key feature must be enabled in all working update policies?

The key feature that must be enabled in all working update policies is uninstall protection. This feature is essential because it safeguards endpoint protection by preventing the unintentional or unauthorized removal of the security software. Uninstall protection ensures that even if a user attempts to uninstall the CrowdStrike Falcon agent, they are either blocked or required to provide authentication before doing so. This is crucial in maintaining the integrity of the security posture of the organization, as it helps to ensure that endpoints remain protected against threats.

While other options present valuable aspects of managing and updating security solutions, they do not encapsulate the same fundamental necessity for maintaining ongoing protection as uninstall protection does. For instance, manual updates may provide flexibility in control, but can introduce risk if not managed properly. Testing in a production environment is a consideration for assessing updates, but it's not an overarching requirement of update policies. Remote management options enhance the management capabilities of an organization’s security tools but are not a mandated feature for the functionality of the update policies themselves. Thus, uninstall protection stands out as the critical necessity for any effective update policy in order to uphold the security infrastructure.