Microsoft Sql Server Error 18542
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Login Failed For User 'sa'. The User Is Not Associated With A Trusted Sql Server Connection
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Error 18452 In Sql Server 2012
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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 error: 18452, severity: 14, state: 1 have seen many new DBA or Developers struggling with this errors.Error: 18452 Login the login is from an untrusted domain sql server 2014 failed for user ‘(null)'. The user is not associated with a trusted SQL Server connection.Fix/Solution/Workaround: Change the Authentication Mode error: 17806, severity: 20, state: 14. 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
GO
https://support.microsoft.com/en-us/kb/889615 ALTER LOGIN sa WITH PASSWORD = '
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