SQL Server: User 'sa 'Logon Failed. Cause: it is not associated with a trusted SQL server connection ..

Problem description:
User 'sa 'Login Failed. Cause: it is not associated with a trusted SQL server connection.
 Note:An error occurred while executing the current Web request. Check the stack trace information to learn about this error andCodeDetailed information about the cause of the error.

Solution:
This problem is generally caused by SQL Server being integrated with Windows authentication, so the solution is:

1. Open the SQL Server Enterprise Manager.
2. Right-click the server name and select "Edit SQL Server Registration attributes". Then, select "use Windows Authentication" in the dialog box ".
3. Try it. No. Check the security settings.
4. Right-click "properties" and open the "Security" tab.
5. On the tab, select "SQL Server and Windows" for authentication.