title: An attempt to login using SQL authentication failed
body: <p>I am trying to connect to SQL Server 2008 using 'sa' username and its password.
  In the SQL Server log file I see this error:</p>
  
  <blockquote>
    <p>Login failed for user 'sa'. Reason: An attempt to login using SQL
    authentication failed. Server is configured for Windows authentication
    only.</p>
  </blockquote>
  
  <p>When I right-clicked on the server -> Properties -> Security "SQL Server and Windows authentication mode" is chosen.<br>
  I thought it's a problem with the 'sa' user so I did:  </p>
  
  <pre><code>ALTER LOGIN sa ENABLE ;
  GO
  ALTER LOGIN sa WITH PASSWORD = '&lt;enterStrongPasswordHere&gt;' ;
  GO
  </code></pre>
  
  <p>But it didn't help.<br>
  What else can it be?  </p>