When deploying Cisco ISE as a virtual appliance on a VMware platform, there are specific VMware features that are supported and recommended:
VM Cold Migration:

Cisco ISE supports cold migration. This means that the virtual appliance can be moved from one host to another while it is powered off. Cold migration is a supported method for relocating the virtual machine in the event of hardware maintenance or upgrades.
OVF Support:

Cisco ISE is distributed as an OVF (Open Virtualization Format) package. This format is supported by VMware environments, making it straightforward to deploy the ISE virtual appliance using standard VMware tools.