This is a really great new feature, and will make it much easier for the helpdesk to take care of leavers! We're just starting out on our 365 journey so having more tools available at this point to ease the team in to things is definitely appreciated.
However I'm disappointed to read it can't be used by orgs in hybrid environments. We use Azure AD Sync with our on-prem AD, and assign licenses through AD group membership. Our leaver process therefore involves disabling the account/moving it to a non-Azure-aware OU to take care of removing the license assignment and releasing it back into the pool, but the OneDrive and Exchange mailbox portions of this workflow would be extremely helpful to us. Brian Besand, if there's some way you can decouple the account/identity parts of the workflow from the OneDrive/Exchange parts so the latter could still be used by those of us in a hybrid configuration, that would be fantastic.