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http://jtds.sourceforge.net/faq.html

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Windows

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Single Sign On (SSO) Authentication using NTML

Just leave the username and password blank and jTDS uses the ntlmauth.dll that is placed in the distributions \libswt\win32 folder and logs on with the logged in user credentials.

For further information search for NTML in the jTDS FAQ. E.g. you can also specify the domain option:

"Specifies the Windows domain to authenticate in. If present and the user name and password are provided, jTDS uses Windows (NTLM) authentication instead of the usual SQL Server authentication (i.e. the user and password provided are the domain user and password). This allows non-Windows clients to log in to servers which are only configured to accept Windows authentication.

If the domain parameter is present but no user name and password are provided, jTDS uses its native Single-Sign-On library and logs in with the logged Windows user's credentials."

Slow processing and locking situations

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