The feature allows migrating virtual machine network adapters from one virtual network to another.
Network migration is an advanced function and it is considered unsafe. It requires some basic knowledge about networks and awareness about networks that exist in the environment. Migrating a virtual machine to wrong networks can result in loss of connectivity and eventually influence business applications running on the VM. Therefore, the feature is turned off by default.
When the feature is on, an extra dialog appears in dialog roadmap of the Migrate, System Clone, and System Copy operations. The dialog allows setting network for every network adapter individually.