It does it automatically when you pay with points at booking. You can book Marriott properties in anticipation of buying/earning the points if you don’t have enough in your account. Doing so requires you to go in at least 14 days prior and deduct the points (technically you purchase an e-cert for the point/night value and it’s attached to your reservation).

Went through this myself with a pre August reservation. Called the plat line for another issue and almost completely forgot about the e-cert point changes until the rep asked if there was anything else she could help me with. No problem, she’s says she’s a manager and can fix that as well. A few minutes later, she had the additional points added, e-cert ordered and attached to the reservation. So nice to experience that after reading about others’ problems here.

Just to add on here, from my experience and others, the usual fix for this is for the rep to add difference in points to your account and then purchase the e-cert at the new rate.

Did you originally reserve an upgraded room or not? Did they change the reservation to move you to an upgraded room for some reason, or no reason at all? I would guess that a TPS would normally have regular studio-type rooms (most of the rooms in the property would be this category) with 2Q or 1K bed, plus a very limited number of genuine one-bedroom and two-bedroom suites.

If you're booked into a regular room, it would seem that someone is making up stuff about the upgrade costing more points.

The fact that Marriot sometimes automatically deducts the points when you make the reservation and sometimes does not has been confusing to me also, coming over from Starwood where the points are always automatically deducted almost instantly. The Marriot way makes it confusing to keep track of how many points you have left. You can look at your Marriot account under Activity and see whether the points for your stay were already deducted.