This document discusses hybrid architectures and various deployment options for SharePoint. It presents 3 scenarios for hybrid deployments: 1) all data in Office 365, 2) site data on-premises and personal data/conversations in the cloud, and 3) all data locally with conversations in the cloud. It also covers other hybrid topics like identities management, development environments, disaster recovery, and governance considerations for determining appropriate workloads for cloud vs. on-premises.