How can I change from SQL Server Windows mode to mixed mode (SQL Server 2008)?

Solution 1:

You can do it with SQL Management Studio -

Server Properties - Security - [Server Authentication section] you check Sql Server and Windows authentication mode

Here is the msdn source - http://msdn.microsoft.com/en-us/library/ms188670.aspx

Solution 2:

I had no success with other attempts on a SQL Server 2012. What I did was use SQL Server Management Studio to generate a script to change the value, and got this:

USE [master]
GO
EXEC xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'LoginMode', REG_DWORD, 2
GO

After that, I enabled the sa account using this:

ALTER LOGIN sa ENABLE ;
GO
ALTER LOGIN sa WITH PASSWORD = '<strongPasswordHere>' ;
GO

...then, I restarted the service, and everything worked!

Solution 3:

From this: http://weblogs.sqlteam.com/peterl/archive/2008/06/19/How-to-change-authentication-mode-in-SQL-Server.aspx

One can catch that you may change it through windows registry key

(SQLEXPRESS instance):

"Software\Microsoft\Microsoft SQL Server\SQLEXPRESS\LoginMode" = 2

... and restart service

Solution 4:

Open up SQL Server Management Studio and connect to your database server.
Right Click The Database Server and click Properties.
Set the Server Authentication to SQL Server and Windows Authentication Mode.

Solution 5:

From MSDN:

To change security authentication mode:

In SQL Server Management Studio Object Explorer, right-click the server, and then click Properties.

On the Security page, under Server authentication, select the new server authentication mode, and then click OK.

In the SQL Server Management Studio dialog box, click OK to acknowledge the requirement to restart SQL Server.

In Object Explorer, right-click your server, and then click Restart. If SQL Server Agent is running, it must also be restarted.

To enable the SA login:

In Object Explorer, expand Security, expand Logins, right-click SA, and then click Properties.

On the General page, you might have to create and confirm a password for the login.

On the Status page, in the Login section, click Enabled, and then click OK.