Allow hot migrate is not enabled for ISOs by default because not all OSs will work with hot migration. You can turn on hot migration for these ISO templates with the following API call, though please note if it does not work, we will not be able to provide support for failed migrations of ISO-built VSs.
To hot migrate a VM that is running off of ISO, use the following request:
XML Request Example
JSON Request Example
id - ID of the ISO you used