In order to prevent duplicate Agent IDs, what install parameter should be used on VMs...

The correct parameter is VDI=true. In virtual desktop or cloned virtual machine scenarios, Falcon must avoid duplicate Agent IDs across clones. Persistent clone workflows require sensor installation to be performed with the correct VDI parameter so that each cloned endpoint registers properly and receives a unique identity. ProvNoWait=1 is used for provisioning-timeout behavior and does not address duplicate Agent IDs. NO_START=1 is used in some deployment contexts to delay sensor start but is not the VDI identity control. VM=True is not the documented Falcon parameter. CCFA sensor deployment guidance treats VDI and golden-image preparation as a distinct deployment pattern because cloning a sensor incorrectly can duplicate identity and corrupt host tracking, policy assignment, and detection attribution.