They would like to send the letters to me
Depending upon how they send the letters to you and how they expect Acrobat to convert them you could be bordering on a license violation that prohibits you from using your version of Acrobat as a server-based product.
Adobe offers server based products to convert rtf files into pdf files. Some require your company to run a server, but one seams exactly what they may want. The createpdf service is run by Adobe and seems capable of doing what your company wants.