For virtualization hypervisor platforms and management tools:
Updates/upgrades to OS, application, database or hardware
Addition/modification of objects
New/modified users, groups, and roles For VMs:
Deployment/modification/deletion of VM
Change in life cycle stage
Movement of VM to new host For virtual networks:
Adding/deleting/modifying virtual switches
Modifying VLANs, trunks, and so on
Network properties (for example, promiscuous mode) For VM templates:
Generation of a new template from a VM
Conversion or cloning to a VM for changes
Reconversion of a VM back to a template after changes