Outlook Web App > For Exchange Online Administrators >

Use Unified Messaging to Connect Exchange to Your Telephone System

Applies to: Office 365 for enterprises

Topic Last Modified: 2010-11-05

Unified Messaging (UM) combines users' voice messaging and e-mail messaging into one mailbox that can be accessed from many different devices. Users can listen to their messages from their e-mail Inbox or by using Outlook Voice Access from any telephone. You have control over how users place outgoing calls from UM, and the experience people have when they call in to your organization.

The following information will help you set up, configure, and maintain a cloud-based deployment of UM in your organization:

Want to deploy UM both on-premises and in the cloud?   See Set Up Unified Messaging in a Hybrid Deployment.