How to change SQL Server Authentication Mode?

SQL Server use two Authentication mode:

• Windows Authentication mode

- currently logged user in Operation System is used to connect to Server - if the user has permissions to do so.

• SQL Server and Windows Authentication mode

- we can use login that is defined in SQL Server.

We can change the a authentication mode via T-SQL and Managemement Studio .

1) T-SQL

Go to Properties of Instance and click on Security on the left panel. And now you can choose two types of Server Authentication.

SQL Server Authentication Mode GUI

2) Managemement Studio

- to change the Windows Authentication mode use this query below:

- to change the SQL Server and Windows Authentication mode use this:

After the change you have to restart SQL Server and SQL Server Agent!