Microsoft Sql Server 2008 R2 Error 18452
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Connection Failed Sqlstate 28000 Sql Server Error 18452
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Sql Server Error 18452 Severity 14 State 1
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SERVER - Fix : Error: 18452 Login failed for user ‘(null)'. The user is not associated with a trusted SQL Server connection. April 14, 2007Pinal DaveSQL, SQL Server, SQL Tips and Tricks193 commentsSome errors never got old. I login failed for user 'sa'. the user is not associated with a trusted sql server connection have seen many new DBA or Developers struggling with this errors.Error: 18452
Error 17806
Login failed for user ‘(null)'. The user is not associated with a trusted SQL Server connection.Fix/Solution/Workaround: Change the Authentication the user is not associated with trusted sql Mode of the SQL server from "Windows Authentication Mode (Windows Authentication)" to "Mixed Mode (Windows Authentication and SQL Server Authentication)".Run following script in SQL Analyzer to change the authenticationLOGIN sa ENABLE
https://support.microsoft.com/en-us/kb/555332 GO
ALTER LOGIN sa WITH PASSWORD = '
SERVER - FIX ERROR - Cannot connect to . Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. (Microsoft SQL Server, Error: 18452) September 6, 2012Pinal DaveSQL, SQL Server, SQL Tips and Tricks35 commentsJust a http://blog.sqlauthority.com/2012/09/06/sql-server-fix-error-cannot-connect-to-login-failed-the-login-is-from-an-untrusted-domain-and-cannot-be-used-with-windows-authentication-microsoft-sql-server-error-18452/ day ago, I was doing small attempt to connect to my local SQL Server using IP 127.0.0.1. The IP is of my local machine and SQL Server is installed on the local box as http://stackoverflow.com/questions/3583605/login-failed-for-user-sa-the-user-is-not-associated-with-a-trusted-sql-server well. However, whenever I try to connect to the server it gave me following strange error.Cannot connect to 127.0.0.1. Login failed. The login is from an untrusted domain and cannot be used with Windows sql server authentication. (Microsoft SQL Server, Error: 18452) The reason was indeed strange as I was trying to connect from local box to local box and it said my login was from an untrusted domain. As my system is not part of any domain, this was really confusing to me. Another thing was that I have been always able to connect always using 127.0.0.1 to SQL Server and this sql server error was a bit strange to me. I started to think what did I change since it last time I connected to SQL Server. Suddenly I remembered that I had modified my computer's host file for some other purpose.Solution:I opened my host file and immediately added entry like 127.0.0.1 localhost. Once I added it I was able to reconnect to SQL Server as usual. The location of the host file is C:\Windows\System32\drivers\etc. You will find file with the name hosts in it, make sure to open it with notepad.If you are part of a domain and your organization is using active directory, make sure that your account is added properly to active directory as well have proper security permissions to execute the task.Reference : Pinal Dave (http://blog.SQLAuthority.com) Tags: SQL Error Messages1722Related Articles SQL SERVER - 2005 - Explanation of TRY…CATCH and ERROR Handling April 11, 2007Pinal Dave SQL SERVER - Fix: Error 2596 The repair statement was not processed. The database cannot be in read-only mode August 6, 2007Pinal Dave SQL SERVER - SSMS Query Command(s) completed successfully without ANY Results January 19, 2010Pinal Dave 35 comments. Leave new Anonymous September 6, 2012 8:48 pmI was laughing because you put in the loop
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