When printing PDF files through Internet Explorer rather than directly through Acrobat, the job code for the Ricoh printers does not pass through resulting in nothing being printed.
Ricoh print codes are not passed through to the printer when a PDF is called from within a web browser resulting in nothing being printing on the Ricoh device in both Windows and Mac OS's. Opening the PDF in Acrobat Reader directly will allow the codes to pass through to the printer. This is an older issue and may be resolved going forward.
To resolve this issue, open up Acrobat Reader, go to edit - preferences. Select the Internet catagory and uncheck the box for Display PDF in browser as shown below. Click ok and close Adobe Reader.