SQL Server Security Mode.
Applies to: Microsoft System Center Configuration Manager 2007 SP2, SQL Server 2008 
SP1
 
Problem Description.
 
While installing Microsoft System Center Configuration Manager 2007 SP2 (SCCM), 
we received the following warning on the Installation Prerequisite Check page of 
SCCM setup:
SQL Server security mode (warning)
The SQL Server name specified is configured for SQL authentication security. It 
is recommended to configure the SQL Server to operate only in Windows 
authentication security before continuing Configuration Manager Setup.

Cause.
The authentication mode on the SQL Server instance is configured “SQL Server and 
Windows Authentication Mode”. SCCM setup requirements expect the SQL Server 
instance should work with Windows Authentication mode.
Solution.
Change the security mode on the SQL Server instance using the following 
procedure:
1.In SQL Server Management Studio Object Explorer, right-click the server, and 
then click Properties.
2.On the Security page of the Server Properties dialog, under Server 
authentication, please select "Windows Authentication mode".

3.In the Server Properties dialog, click OK.
Restarting the SQL Server service is required.
Please click on the "Run Check" button of the Installation Prerequisite Check 
page of SCCM setup, to verify the warning was eliminated.