1st You must query out Panasonic equipment and machines with Tpm 2.0 set.
WMI namespace: root\CIMV2\Security\MicrosoftTpm
WQL query: SELECT * FROM Win32_Tpm WHERE NOT SpecVersion LIKE “1.2”
2nd You MUST ensure that AC is connected, otherwise the Tpm downgrade will fail. Here is a script I made that tosses a prompt if off AC and loops until AC is plugged in.
And lastly, run the TPMFUac64.exe with the -d argument to execute the downgrade of the Tpm chipset. This will require a reboot, which you can roll into the standard reboot that occurs after the OS is applied.
* TPMFUac64.exe must be requested from your local technical support team.