Ensure you have installed Java JDK 1.5 or higher. Current version is 8.0.25. Install this JDK in the default directory. This then gives you access to install the Jar file below.

Navigate to the ibm.com website and search for Informix JDBC.3.70.JC8 Driver. Download this to you server. Extract the .tar file to the bin folder under the JDK install directory. This just makes is easier to install the jar file.
Open CMD and navigate to the SDK directory and run the following command to launch the Informix JDBC Driver setup wizard

“java -jar setup.jar”

This launches the install wizard for the JDBC Driver, follow the prompts and accept the defaults, this will install the JDBC driver under the C:\Program Files\ibm\Informix_JDBC_Driver\lib\ directory. Open the Quality Management Administrator and navigate to Cisco Unified CC Database page. Ensure the JDBC Driver path is C:\Program Files\ibm\Informix_JDBC_Driver\lib\ifxjdbc.jar.