If you’re using BitLocker, you need to be backing up the TPM ownwer password. By default, Windows does not back up this information when you encrypt a computer with BitLocker. Should you need to make changes to the TPM device, you’ll need this password.
If you try to manage BitLocker drive encryption on a computer that has had a user type in his/her PIN too many times, you may get this error: BitLocker Drive Encryption Error Cannot run. The TPM is defending against dictionary attacks and is in a time-out period.