As SOI 4.2 uses latest "sqljdbc4-4.0.jar" which is available in following folders on the SOI Manager
=> \SOI\Tools\Priming Utility\lib
=> \SOI\indexer\lib
We need to adjust the Enrichment policy "Class Path" as shown in the picture
<Please see attached file for image>

Note: You may copy this new .jar to other folder and adjust the "Class Path"