Microsoft Exchange Server 2013: Connectivity, Clients, and UM

Hybrid operations, migration, and coexistence

Office 365 is like many other products in that it has its own vocabulary that you must master as part of the deployment process. In Microsoft parlance, a hybrid deployment is one in which you maintain your own on-premises servers and link them to Office 365. You can mix and match Office 365 products in a hybrid deployment; for example, you could have an on-premises Exchange deployment and a hybrid Lync deployment within the same organization. (This deployment mode used to be called rich coexistence, which is more descriptive but also clunky-sounding.) Most organizations will use hybrid deployments for at least part of their Office 365 life cycle because the easiest way to get onto Office 365 in the ...