Originally Posted by
mharlan100
Search on the Marriott website, not the app. When you search, be sure to check the box for "Use Points". Under the dates selection, choose "Flexible Dates" and a select a month. This will show all dates available on points only for that month. Availability can be sparse, but there is some. Right now there is a whole week in March of 2020 if you are willing book that far out. I had to book a year in advance to get a whole week together on a single reservation, which I believe is required get the 5th night free.
Whenever I've done this the search doesn't distinguish between "points only" and "points plus cash upgrade". Are you sure you're seeing something differently?