To make jTDS driver to work with your SQL server windows authentication use below jdbc url format. 1. windows authentication without SSO jdbc:jtds:sqlserver:// <HOSTNAME>:1433;instance= SQLEXPRESS;databaseName= lportal;domain=<domain>;user= <user>;password=<password> 2. windows authentication with SSO jdbc:jtds:sqlserver:// <HOSTNAME>:1433;instance= SQLEXPRESS;databaseName= lportal;domain=<domain> and set the java argument something like this to load ntlmauth.dll -Djava.library.path="<driver-folder>/windowsSSO" Note : if you are installing sqlexpress/sql server on your desktop or server you need to enable tcp/ip connectivity to the instance. Steps to enable tcp/ip connectibity: 1. Open SQL Server Configuration Manager 2. Goto Configuration Manager > SQL Server Network Configuration > Protocols for <instancename> 3. Right click on TCP/IP and select enable. ...