If PUK retrieval is activated in your subscription, your IT team can help users unblock their blocked smart card by leveraging the SmartCard’s Pin Unblocking Key (PUK) a key that allows you to reset the pin without having to reset the smart card and lose the cryptographic keys.
This setting cannot be retroactively enabled since EZSmartCard will not store the randomized PUKs if PUK retrieval is not enabled.