Logins via the Network Policy Server (NPS) fail with reason "Authentication failed due to a user credentials mismatch. Either the user name provided does not map to an existing user account or the password was incorrect."

Assume the following scenario:

  • A certificate-based login is performed with user or computer accounts to connect them to a wireless (IEEE 802.11 or Wireless LAN) or wired network (IEEE 802.3), or a remote access connection (e.g. DirectAccess, Routing and Remote Access (RAS), Always on VPN) to register.
  • As a server for authentication, authorization and accounting (AAA), the company uses the Network Policy Server (NPS) from Microsoft.
  • Logging on to the network is no longer possible.
  • The network policy server logs the following event when a login attempt is made:
Network Policy Server denied access to a user. [...] Authentication failed due to a user credentials mismatch. Either the user name provided does not map to an existing user account or the password was incorrect.
Der Netzwerkrichtlinienserver hat einem Benutzer den Zugriff verweigert. [...] Authentifizierungsfehler aufgrund der Nichtübereinstimmung von Benutzeranmeldeinformationen. Der angegebene Benutzername ist keinem vorhandenen Benutzerkonto zugeordnet, oder das Kennwort war falsch.
Continue reading „Anmeldungen über den Netzwerkrichtlinienserver (engl. Network Policy Server, NPS) scheitern mit Grund „Authentication failed due to a user credentials mismatch. Either the user name provided does not map to an existing user account or the password was incorrect.““
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