The OS used is Windows 2012R2 "Legacy mode" OS, my TPM 2.0 chip is displayed as "The TPM is ready for use with reduced functionality" in Windows TPM management console(tpm.msc), I have tried to clear TPM and back to OS again, this issue still exist

And moreover, when I tried to prepare the TPM, it displayed "The TPM security hardware on this computer is ready for use, with reduced functionality(consistent with previous OS versions)"

After that, I try to install Windows 2012R2 "UEFI mode" OS, it seems like it works without problem.("The TPM is ready for use" is displayed in Windows TPM management console)

Does TPM 2.0 is supported by Windows 2012R2 "Legacy" mo