In VM management, what does a published library facilitate?

A published library facilitates subscription access to shared resources by providing a centralized storage location where virtual machine templates, ISO images, and other artifacts can be stored and shared among users or different parts of an organization. This functionality enhances efficiency and collaboration, allowing for a streamlined process in deploying and managing virtual machines. Users can subscribe to these shared resources, ensuring they have access to the latest versions of templates and images necessary for creating and managing virtual machines effectively. This is particularly useful in environments where maintaining consistency and availability of VM templates is critical.

In contrast, the other options do not accurately represent the primary function of a published library. While isolation of virtual machines for security, automatic deletion of unused VMs, and the creation of manual backups are important aspects of VM management, they are not directly facilitated by the concept of a published library.