@msvirtualguy I'm on FreeNAS-Corral-MASTER-201704040629 and it's working for me. But it didn't in the initial release.
Go to System > Updates > Settings and you can get there. There's even a newer version than I have and I upgraded this AM.
I'm not a fan of this going nightly thing but that seems to be what they're doing instead of releasing a new dot release every 72 hours.
This is a big upgrade to the UI and I'm getting the sense they're still doing lots of bug fixes in nightlies instead of new functionality.