What must you ensure about the vCenter Server setting to maintain virtual appliance protection?

To maintain virtual appliance protection in a vCenter Server environment, it is essential that vMotion is restricted for protected appliances. vMotion allows for the live migration of virtual machines from one host to another without downtime, but this can pose a significant risk to security. When vMotion is enabled for virtual appliances that require protection, there is a potential for unauthorized access or exposure of sensitive data during the migration process. By ensuring that vMotion is disabled for protected appliances, you effectively avoid these vulnerabilities and secure the integrity of your virtual appliances throughout their operation.

The other options present considerations that do not directly impact the fundamental need for maintaining protection in this context. Configuring for maximum resource usage could lead to performance issues, restricting network access entirely may hinder necessary communication between appliances, and enabling automatic updates, while generally beneficial, does not specifically address the context of ensuring secure protection mechanisms in a live virtual environment.