Is it possible to change the Virtual Appliance hostname or IP address?
Virtual Appliance 14.x
No, it's not possible to change the Virtual Appliance hostname or IP address.
The client needs to redeploy a new node with the desired hostname. Changing the IP/hostname of the VAPP is not supported.
https://techdocs.broadcom.com/us/en/symantec-security-software/identity-security/identity-suite/14-4/symantec-iga-reference-architecture/foundation-physical-architecture/base-system-configuration-requirements/requirements-for-virtual-machine-platform-networking-configuration.html