If you've tried sending a fax and have received no notification about the request or it's outcome, check to make sure the file name of the PDF you've attached only contains letters, numbers, and/or spaces. We've seen where attaching a PDF that contains commas in the file name has entirely stopped the fax before it even begins to be processed by the fax server.
As always, if you have any questions, feel free to call Help Desk at 870-230-5678