Creating a snapshot of VM instances
In VM environments, it is recommended to stop the VM instance and take a snapshot or clone of the VM instance before the upgrade. If there are issues with the upgrade, you can revert to the VM snapshot or clone.
Avoid taking snapshots when applications in the virtual machine are communicating with other computers.
Before upgrading a FortiManager VM, upgrade your VM server to the latest stable update and patch release offered by the VM host server provider.