Microsoft only tracks earned certifications. Many of the Microsoft Official Curriculum (MOC) courses prepare students for certification exams (although often they are just one of the pieces needed to prepare for taking the exams). So if you didn't
take a certification exam after the class and New Horizons doesn't have any records, it is likely that you will not be able to document your attendance.
If you did take and pass at least one Microsoft certification test, you can logon to the MCP site listed below and view your official transcript.
https://mcp.microsoft.com/mcp/
Brian