Microsoft SQL Error 18456 is the common error that most DBA or developer have come across, while working on SQL server.
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SQL Server Error 18456 - Know How to Resolve it ?
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The error will generate the error number 18488 instead of 18456 because for SQL login, the changed password dialog is just delays logging in, not a login failure. It occurs when login needs to have its password changed as per its password policy. This state indicate the need to change password. This error occurs when you try to access the SQL Server, but its Services are paused.
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States 11 & 12 indicates that SQL Server was able to authenticate you, but weren't able to validate with the underlying Windows permissions. Microsoft SQL error 18456 indicates that the login is valid but server access failed. The state indicates that password is violating its policy check and got rejected as invalid one.
SQL Server error 18456 message indicates Invalid Password. The error is caused due to wrongly typed password(case insensitivity case) or you have specified the wrong database. (Microsoft SQL Server, Error: 18456) error indicates Password mismatch.
The 18456 error occurs when you disabled login while password is incorrect. In this, password validation is done first, while login is disabled, you will get error of 18470. The error occurred due to disabled login and correct password. This state occurs when you specify any login as SQL server account, but try to login as Windows account. This means you tried to specify SQL authentication. SQL error message 18456 indicates that you entered Windows style login in the form of Domain or Username. If you are trying to connect to the database with wrong username or misspell login name, you will get this error. Like in State 2, this state also indicates that the login does not exist. State 2 in SQL Server Error 18456 login failed for user occurs when the user is trying to logged in by wrong login, or you have created a server-level login in which you logged in by wrong username. SQL Server error 18456, State 1 occurs when login is disabled and user is not able to login to the SQL Server. (Microsoft SQL Server Error 18456) - Indication by States Connections being attempted when the service is shut down.Various causes of SQL Server error 18456 are as follows: (Microsoft sql server error 18456)' with different states. There are several error messages of 'Login failed for user 'sa'. SQL Server Error 18456 - Different Causes To determine the error, you can check the server error’s log. The State of this error will always be shown as 1 irrespective of the nature of the problem. The reason this message is in encrypted form is to prevent the information declaration to an unauthorised clients. One can get different State errors with same error message. SQL Server Error 18456 message depicts the Password Authentication Error while connecting to SQL Server. If the SQL Server gives an error that prevents login from succeeding, the user will get the following error message: Msg 18456, Level 14, State 1, Server, Line 1