You are currently viewing Troubleshooting Error Number 18456 Severity 14 State 1 Sql 2008

Troubleshooting Error Number 18456 Severity 14 State 1 Sql 2008

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    In the past few days, some of our readers have encountered error message 18456, severity 14, state 1 sql 2008. This issue can have multiple causes. We will discuss this below. The commonly used message “Login failed for user (Microsoft SQL Server, error: 18456)” indicates that you entered invalid credentials when logging on to SQL Server. In the screenshot below, I am logging into Microsoft SQL Server Management Studio with a user who does not currently have administrator rights to log into someone’s server.


    attribute value
    Product name SQL Server
    Event Source MSSQLSERVER
    component SQL Engine
    Symbolic identifier 18456
    event name LOGON_FAILED
    Message text Login failed for user ‘%. * ls’.%. * ls


    error number 18456 severity 14 state 1 sql 2008

    If a login attempt could be rejected due to a failed customer authentication or bad password, a message similar to the following is returned to the appropriate client: “Fuser login failed or simply “. (Microsoft SQL Error: Server, 18456) “.

    Additional Error Information

    For added security, thinking about errors that are usually sent back to the client intentionally obscures the nature of the authentication error. However, in the SQL Server error log, the identical error contains an error state related to authentication and unsuccessful disease. Compare the error status with one andfrom the following lists to determine the cause of the connection error.

    State Description



    not available. This status means that you do not need permission to receive information about the error. Contact your SQL Server administrator for more information. 2 Invalid user ID. 5 Invalid user ID. 6 An attempt was made to use a Windows logon domain name with an SQL Authentication Server. 7 Login is disabled and password is incorrect. 8 This is wrong. 9 Invalid password. 11 The connection is currently valid, but the server could not be accessed. A possible cause of this error can be described if a Windows user has access to SQL Server as a member of the Windows Local Administrators group and is still not holding an Administrators meeting. Log in to start the Connector using subRun as Administrator od, and then add the Windows user as an exclusive connection to SQL Server. 12 The connection is valid, but the computer has not been able to access the Internet. 18 The password needs to be changed. 38, 46 It can be determined that a user-created SQL database has not been queried 58 if the server is configured to only switch to Windows Authentication and someone is trying to connect using SQL Authentication. Another reason is SID mismatch. 102-111 AAD error. 122 124 An error occurred due to a blank workname or password. 126 The requested database does not exist. 132-133 AAD error.

    There are other error conditions that indicate efficient handling of unexpected internal errors.

    Cause of error Failed to connect using SQL Authentication. The server is configured for authentication windows only. he can return in the following situations.

    • How do I fix Login failed for Microsoft SQL Server Error 18456 Step by add SQL administrator to SQL Management Studio?

      Go to the security blog page. In the Server Authentication section, select the SQL Server and Windows fm Authentication Mode radio button. Click on OK. Restart SQL services.

      If web The server is configured for mixed mode validation and the ODBC connection uses TCP, and the bandwidth service does not explicitly indicate that a trusted connection should be used for transmission.

    • If all servers are configured for mixed function authentication and the ODBC connection contains named pipes and credentials, the client used to open the specified pipe necessarily impersonates the user, and the connection does not seriously indicate explicitly that the connection should use a trusted one compound.

    To solve this problem, add TRUSTED_CONNECTION = TRUE to the chained connection.


    error number 18456 severity 14 state 1 sql 2008

    In this example, the authentication error status is 4. This means that the password is incorrect.

    Date Source Message
    2007-12-05 20:12: 56.34 Register Error: 18456, Severity: Fourteen Only, Status 8:.
    2007-12-05 20:12: 56.34 Register Login failed for operator ““. [CLIENT: ]

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  • If you are definitely trying to connect using SQL Server Authentication, make sure SQL Server is configured in Mixed Mode Authentication. For more information on changing the SQL Server Authentication Mode, see Changing Hosting Authentication Mode

    If you are trying to log in using SQL Server Authentication, make sure you have a SQL Server account or you have written it correctly.

    If you are trying to log in using Windows Authentication only, please make sure you are successfully logged into the arena.

    How do I fix SQL Server error 18456?

    Step 1. Log in using Remote Desktop.Step 2. Start Microsoft SQL Server Administration.Step 3: Check out our custom server authentication mode.Step 4: restart the SQL service.Step 5: Check SQL user permissions.Step 6: Map the user to the database.

    If your error indicates status 1, contact your SQL Server administrator.

    If you are in no doubt that you are trying to log on using your boss’s credentials, use the Run as administrator option. After logging in, add your Windows user as individual logon is required.

    If the engine website supports offline databases, make sure the login type was not removed after switching to offline user.

    How do I fix SQL Server failed login?

    Right click on your server.Go to the security option.Activate the option “SQL Server and Windows Authentication Mode”Click the General Ok button.

    When backlinks are created locally to an instance of SQL Server, Connectivity Services running on NT AUTHORITY NETWORK SERVICE must authenticate by sending computers with full domain credentials. For more information, see How to Use the Network Service Account to Access Resources in ASP.NET

    • 4 minutes to read.

    If SQL Server is installed using Windows Authentication Mode and then changed to SQL Authentication Mode and the Windows computer, the sa connection is usually disabled initially. This raises an error. Issue 7: “Visitor sa failed to login.” ┬╗Activate for Internet browsing, see Changing Server Authentication Mode .

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