Error Message: "Smart Card Logon Is Not Supported for Your User Account"

Smart card login attempts fail with the error "You cannot use a smart card to log on because smart card logon is not supported for your user account", possibly indicating your Domain Controller does not have a valid certificate.

Potential Solution

Follow these steps to request a new certificate:

Log in to the Domain Controller
Open the Run prompt and run mmc (if prompted to elevate permissions, select Yes)
Click File > Add / Remove Snap-In...
Select Certificates and click Add
Select Computer account and click Next
Select Local computer and click Finish
Click OK
In the tree view on the left, navigate to Certificates (Local Computer) > Personal > Certificates
Click Action > All Tasks > Request New Certificate…
Click Next
Select Domain Controller Authentication and click Next
Click Finish