18456 microsoft sql

However, in the SQL Server error log, a corresponding error contains an error state that maps to an authentication failure condition. Compare the error state to the following list to determine the reason for the login failure. The error reason An attempt to login using SQL authentication failed. Server is configured for Windows authentication only. When the server is configured for mixed mode authentication, and an ODBC connection uses the TCP protocol, and the connection does not explicitly specify that the connection should use a trusted connection.

When the server is configured for mixed mode authentication, and an ODBC connection uses named pipes, and the credentials the client used to open the named pipe are used to automatically impersonate the user, and the connection does not explicitly specify that the connection should use a trusted connection. In this example, the authentication error state is 8.

This indicates that the password is incorrect. This causes the state 7 error: "Login failed for user 'sa'. For more information on changing SQL Server authentication mode review Change server authentication mode.

If you are trying to connect using Windows Authentication, verify that you are properly logged into the correct domain. To do so, follow the below-mentioned steps:. You can also use any of the below search term to find the solution to resolve Microsoft SQL Server error code Your email address will not be published.

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