Currently, Symantec Encryption Desktop supports Smartcards\tokens for Legacy Systems only. Support submitted a Feature Request to include the ability to use Smartcards\Tokens on UEFI systems.
Support has worked directly with Product Management and has determined this feature will not be included at this time, however, Smartcards is fully supported with UEFI systems with Symantec Endpoint Encryption.
Please subscribe to this article for any updates. To be added to this Feature Request, please contact support who will track specific customer requests therein.