Adobe Acrobat Professional and Reader have their own built-in printing protocols that bypass the Mac system settings. This creates a problem with Ricoh copiers that require a code to print--the built-in Adobe protocols bypass the Mac system settings, and the user code is not passed to the printer. This is why your access is restricted when printing pdfs, but your Word files print just fine.
This is how to print from Adobe Acrobat to a Ricoh copier. You will need to follow these steps each time you print a pdf.