If you have a supported Trusted Platform Module (TPM) device that has been installed in your ESXi host after the initial installation and you either replace the TPM chip and/or you reset the TPM keys within the system BIOS, you may find several TPM alarms that is raised within your vCenter Server including:
- Host TPM attestation alarm
- TPM Encryption Recovery Key Backup Alarm
- The new host TPM endorsement key doesn't match the one stored in the DB
I recently had to resolve this in my lab after clearing the TPM keys within the system BIOS, this was for some testing I was doing, but I could not figure out how to get vCenter Server to clear the previous endorsement keys associated with the ESXi host.
After a bit of searching, I came across this VMware KB 81446 which outlines a solution to one the scenarios I mentioned above where you would see these TPM alarms, which is replacing the TPM chip, but I came to find out that the workflow is also applicable if you had cleared the TPM keys and new ones were generated prior to re-installing ESXi. The KB was missing a some details, which I have already shared in the feedback and I think there is a more streamline method which I have shared below.
