Unified Messaging is the integration of a recipient's voice, fax and e-mail messages into one Inbox. Exchange Server 2007 Unified Messaging integrates Exchange Server with an existing telephony network infrastructure. An Exchange Server 2007 Unified Messaging server processes incoming and outgoing voice and fax calls, and then routes the messages to the intended recipients in an Exchange organization.

The Solution provides the reference architecture and deployment guidelines for a subset of the full Exchange Server 2007 Unified Messaging capabilities, in a multitenant deployment.

The goal of Unified Messaging is to integrate Exchange with telephony networks and bring unified messaging features to the core of Exchange. For this version of the Solution, the focus is on Outlook Voice Access (OVA) functionality.

With the ability for customers to check e-mail and calendar information from a landline handset, hosters can continue to differentiate themselves with messaging based on the Exchange Unified Messaging OVA features.

The following figure illustrates the set of components in an example Hosted Unified Messaging deployment.