Just one data point, but I thought I'd share. I'm staying 3 nights with a friend on his corp. rate (he's plat, I'm gold) at the New Orleans Renaissance. I called the front desk, explained the situation & they said it'd be no problem to credit both accounts for elite nights.

I don't care so much about the points earned, but it'd be nice to get the night credit, which shouldn't be an issue. All I have to do is give them my MR # when we check in.

I'll post an update next week after the trip!