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.
For native connectivity, install the version of PostgreSQL client appropriate for the PostgreSQL database server version.
To ensure compatibility between Informatica and databases, use the appropriate database client libraries.
You must install compatible versions of the PostgreSQL client and PostgreSQL database server. You must also install the same version of the PostgreSQL client on all machines that require it. To verify compatibility, contact PostgreSQL.