{"id":6457,"date":"2019-04-23T07:49:23","date_gmt":"2019-04-23T06:49:23","guid":{"rendered":"http:\/\/wordpress.semnaitik.com\/?p=6457"},"modified":"2025-01-25T10:27:19","modified_gmt":"2025-01-25T09:27:19","slug":"sql-server-login-failed-error-18456","status":"publish","type":"post","link":"https:\/\/wordpress.semnaitik.com\/blog\/sql-server-login-failed-error-18456\/","title":{"rendered":"SQL Server login error 18456- Know how to resolve it"},"content":{"rendered":"\n

In this article, you\u2019ll come to know how to troubleshoot the SQL Server Error Code 18456. I\u2019ll take into the picture the reasons behind the occurrence of this particular error code and the possible manual and alternate solutions to fix the same.<\/em>
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MS SQL Server error 18456 appears when there is a failure on login attempt made by the user. It appears even if the username has been accepted without actually defining the reason of the error. There can be various reasons for this error. However, error details can be checked by the administrators in the event log.
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SQL login error 18456- An Overview<\/strong>
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Generally, the error messages are displayed with a description of what went wrong as in Outlook. But, in case of SQL Server login failed error code 18456, no proper reason for failed login is displayed making it complicated for the users to fix the error. The application is developed in a way to protect from unauthorized users. However, Administrators can check and view the event log for getting the details of the error 18456. The SQL server login error 18456 is displayed as:
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Common causes for SQL Server login error code 18456<\/strong>
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There are some probable causes behind this error:
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  1. One among the username and password or both are incorrect.<\/li>
  2. Password for the user login has been expired. While disabling the username on the server, it may happen.<\/li>
  3. SQL server is not able to recognize the \u201cWindows Authentication\u201d when the SQL server is logged in for the first time on the SQL server.<\/li>
  4. Different password on different servers by a single user.<\/li><\/ol>\n\n\n\n

    Resolutions to SQL Server Error 18456<\/strong>
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    #1 Manual method<\/strong>
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    When you start the SQL Server for the first time, there are chances that under the security option \u201cWindows Authentication\u201d is enabled. In this scenario, the server may not recognize the user and the above error appears. So, in order to log in through SQL server authentication, follow the below steps.
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