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It is possible to accomplish and relatively straightforward:<br />
<br />
<a href="http://www.mssqltips.com/sqlservertip/2191/how-to-check-sql-server-authentication-mode-using-t-sql-and-ssms/" rel="ugc">http://www.mssqltips.com/sqlservertip/2191/how-to-check-sql-server-authentication-mode-using-t-sql-and-ssms/</a>
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It is possible to accomplish and relatively straightforward:

http://www.mssqltips.com/sqlservertip/2191/how-to-check-sql-server-authentication-mode-using-t-sql-and-ssms/ [http://www.mssqltips.com/sqlservertip/2191/how-to-check-sql-server-authentication-mode-using-t-sql-and-ssms/]

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Hello: <br />
I installed MS SQL server 2008r2 ( Full version - 180 days evaluation) with NT Authontication mode.<br />
Now I need to have it with Mixed mode.<br />
Is there a way to fix that post installation , how?<br />
Do I need to reinstall?<br />
<br />
Thank you.
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Hello: 
I installed MS SQL server 2008r2 ( Full version - 180 days evaluation) with NT Authontication mode.
Now I need to have it with Mixed mode.
Is there a way to fix that post installation , how?
Do I need to reinstall?

Thank you.

SQL server 2008r2  Mixed Mode Authontication

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.

Microsoft SQL Server

Microsoft SQL Server 2008 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. Major improvements include the  Always On technologies and support for unstructured data types.