The final step in the application process is to complete an online MPDU Application Tutorial (formerly the Application Session) and submit your application online. The MPDU Office no longer accepts paper applications. Before signing up for the Application Tutorial and submitting your application, you will need to validate your attendance at the first two required classes. You will need to enter your Orientation ID. After validation you will receive instructions to create an online account for Montgomery County?s secure MPDU Application Portal. All MPDU classes are valid for two years. If you took either the First-time Homebuyer Class or the Orientation Seminar more than two years ago, you must retake any expired classes. Please click on link #1. How to Apply and refer to step 3. Take an Online MPDU Application Tutorial. For a list of required document to submit with your application refer to link #2. List of Documents Required For Your Online MPDU Application.