Returning to Jasperreports after many years (back then using iReports) I have problems connecting to SQL Server. Both when using the JTDS or the Microsoft JDBC driver I cannot get a connection to my local SQL Server Express instance using WIndows Authentication. It returns the dreaded "This driver is not configured for integrated authentication" (for the MS driver) or "SSO failed: native SSPI Library not loaded" (JTDS) messages. With other applications (such as SQL Workbench/J) it works like a charm by placing the respective DLL files in the JRE's bin directory (which in that case is a Java 12). In the case of Jaspersoft Studio I placed them a) in the top directory of JasperSoft, b) in its JRE 1.8 bin directory, c) in WindowsSystem32, d) added it to the java.library.path, e) several places in/within the myreports directory, but all to no avail. The funny thing is that a Test in the data adapter seems to work fine the first time you press it ("Succesful!" message, albeit that it is returned suspiciously quickly). But a second press gets the before mentioned errors. Is there some hidden place I need to store the dll files?