The documentation portal is undergoing maintenance. During this period, you can't create any new user credentials. If you do, you'll need to recreate the user credential after the maintenance period ends.
Install and configure Netezza ODBC driver on the machine where the PowerCenter Integration Service process runs. Use the DataDirect Driver Manager in the DataDirect driver package shipped with the Informatica product to configure the Netezza data source details in the odbc.ini file.