How To Fix Login Failed for User Microsoft SQL Server Error 18456 Step-By-Step

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  • User profile image

    from login - properties - securable --> mark the permission for ( control server )
    this solve the error ISA

  • User profile image

    Right click server name from the SSMS and go to server properties. Click security and enable Wndows and SQL Server Authentication mode. This solution is to the point and will fix the problem.

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