The number of responses allowed per Microsoft Form/Quiz is being increased from 50,000 to 5 million. After a Form passes 50,000 responses, the form can continue to collect additional responses and the Form owner can export the results as a .csv file for further analysis.
Customers can continue to use Microsoft Forms as they do today. There are no changes to forms below the existing 50,000 responses limits and can still be viewed online with full functionality including graphs, summary, individual responses etc.
Forms that exceed 50,000 responses will not have all of the same functionality online but can continue to collect responses and have those responses exported via .csv for further review.