DISCLAIMER: The message below should not be construed as "Bert-baiting about Brother".
I mentioned to my office manager about the Brother-won't-fax-to-PDF controversy raging on this thread, and she told me her low-tech method of converting faxes to PDFs. She takes the paper fax page from the output tray of the Brother MFC, and puts it back into the document feeder, and scans it to her computer. Yes, the Brother MFCs will network-scan to PDF (but not fax to PDF -- go figure).
Yes I know, it's not paperless -- okay, okay. (Bracing myself now for Bert's response).