I would contact support by creating a case at customer.tableau.com so they can help you find a solution.
It does not matter on which platform is your target server running however it looks like you need to install the right driver (and perhaps configure DSN) so you'll either need to get permissions or ask your local admin to do that for you.
What exactly are you trying to connect? Can you be a bit more specific than "SAS" and "DB2"?
This article might help: Connecting to SAS ODBC in Tableau | Tableau Software