Kerberos authentication error Jun 22, 2023 ยท If Kerberos does not recognise the Service Principal Name, it will not grant a ticket and so the login will not take place. Failed logon auditing will allow you to see when users have attempted to log onto the network unsuccessfully and to identify any duplicates. To enable the change in behavior and be secure from the vulnerability, you must ensure all Windows domain controllers are updated with a Windows update release on or after April 8, 2025, and the AllowNtAuthPolicyBypass registry key setting is set to 2 to configure for Stack Exchange Network. exe): Addresses a known issue that might cause authentication failures related to Kerberos tickets you acquired from Service for User to Self (S4U2self). Kerberos would handle the authentication between IIS and the backend resource server. If you do not see this you will need to enable this on the IIS web server or web site. Une erreur liée à Kerberos est un symptôme d’un autre échec de service. To work around the issue, use the NTLM authentication instead of the Kerberos authentication. -Kerberos is used when no authentication method and no user name are specified. .
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