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SEC_E_SMARTCARD_LOGON_REQUIRED
SEC_E_SMARTCARD_LOGON_REQUIRED signals this condition: The account or policy requires smart-card sign-in, but the attempt did not use an eligible smart card. Password-based credentials cannot satisfy an account configuration that requires smart-card logon. This is an intended policy outcome, not a generic authentication outage.
What to check
- Confirm that the account is meant to require smart-card sign-in and that the user has an issued, usable card.
- Check reader detection, certificate availability, PIN flow, and certificate mapping.
- Change the account requirement only through the organization’s identity policy, not as an ad hoc workaround for one sign-in attempt.
Microsoft: Smart-card certificate requirements
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