[This is pre-release documentation and subject to change in future releases. This topic's current status is: Milestone-Ready]

Topic Last Modified: 2010-03-25

Microsoft Communications Server 2010 supports integration with Exchange Unified Messaging (UM) for combining voice messaging and e-mail messaging into a single messaging infrastructure. Exchange Unified Messaging (UM) is one of several server roles that you can install and configure on a computer that is running Microsoft Exchange Server. For Communications Server Enterprise Voice deployments, Unified Messaging combines voice messaging and e-mail messaging into a single store that is accessible from a telephone (Outlook Voice Access) or a computer. Unified Messaging and Communications Serverwork together to provide call answering, Outlook Voice Access, and auto attendant services to users of Enterprise Voice.

For these features to be supported, you must be running either Microsoft Exchange Server 2007 Service Pack 1 (SP1) or Microsoft Exchange Server 2010.

Exchange UM may not be required for Enterprise Voice deployments that have a PBX deployed, because the PBX can continue to provide voice mail and related services to all users. If you eventually retire the PBX, (for example, if you deploy SIP trunking for public switched telephone network (PSTN) connectivity) you must reconfigure Exchange UM to provide voice mail to users who previously used the PBX voice mail system.

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