In a previous post, Microsoft Exchange SP2 and the Hybrid Configuration Wizard, I introduced the Hybrid Configuration Wizard (HCW) and discussed how it makes hybrid deployment (where you have a portion of your mailboxes on premises and a portion hosted in the cloud) much more simple. I recently came across this video, TechNet Radio: “Road to TechEd 2012” - How the Hybrid Configuration Engine Works in Exchange Server, where Ben Appleby discusses the hybrid deployment process and the HCW in particular. It's really helpful, providing good context around the hybrid deployment process.