Disabled Mixed Mode Authentication

Condition

Cannot connect to SQL Server via Mixed Mode Authentication.

Authentication options are not set properly.

Open SQL Server Management Studio.
Right-click the SQL Server instance name the Object Explorer pane.
This is the top-level node in the Object Explorer pane.
Select Properties.
The Server Properties dialog opens.
In the Server Properties dialog, select Security.
In the server authentication options, select SQL Server and Windows Authentication mode.
See Choose an Authentication Mode for more information about Microsoft authentication modes, including Mixed Mode authentication.