I have configured Windows Server 2012 Domain for Smart Card log on and have logged on using a Smart Card. The issue I am having is that when I shut down the server for a day or 2 then attempt to log on using the Smart Card I receive the following error: "Smart Card Log on is not supported for your user account" I enroll the Domain Controller Authentication Certificate then log on using the Smart Card. Why do I have to keep re-enrolling the Domain Controller Authentication Certificate in order to log on with the Smart Card? I have never had this issue using Windows Server 2008, only in 2012. Any help would be appreciated.