The course offering name of a D2L site can be modified by the instructor any time, whereas the course offering code will remain constant.  If you have access to 25+ D2L sites as a Course Administrator or Instructor and you need to find a specific credit course (i.e. an undergraduate or graduate class listed in PeopleSoft), the most effective way would be to look up the course offering code.

This document will help you understand how class sections are listed in PeopleSoft and how that information translates into a Course Offering Code in D2L.