Set Up Unified Messaging in a Hybrid Deployment

Applies to: Office 365 for enterprises

If you want to deploy Unified Messaging (UM) both on-premises and in the cloud, you essentially do two separate deployments: one on-premises and one in the cloud. The following topics explain more about the differences between on-premises and cloud UM, and how to set up your organization for a hybrid UM deployment. For more information about Exchange hybrid deployments, see Exchange Hybrid Deployment and Migration with Office 365.