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Editorial Team
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Asked: 2026-05-27T22:09:33+00:00

I am trying to connect Sql Server Data Base using windows authentication from my

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I am trying to connect Sql Server Data Base using windows authentication from my application using JTDS driver but i got following error

SSO Failed: Native SSPI library not
loaded. Check the java.library.path
system property.

Following are the scenarios where i tried to resolve but still something is missing..

  1. i have added ntlmauth.dll in system directory and it works fine for Sql server 2005.
  2. But the same thing i tried for Sql Server 2008 R2 and Denali but it gives me the same error as i mentioned above
  3. Also i considered bit i mean i copied ntlmauth.dll from x64\SSO\ path in system directory.

I an confused why this is not working for Sql Server 2008 R2 and Denali.

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1 Answer

  1. Editorial Team

    Try by placing the ntlmauth.dll file in the bin folder of your Java Runtime Environment (e.g. C:\Program Files\Java\jre7\bin).

    Be sure to match the “bitness” (32 bit or 64 bit) of the DLL with the JVM bitness.

    I ran into the same issue using SQL Server Express 2008 R2 and this MSDN SQL Server Forum Article recommended this resolution, which worked for me.

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