Exchange Server 2010 unified messaging (UM) delivers voice messaging, fax, and email into a unified inbox. These messages can be accessed from a telephone or a computer. Exchange Server 2010 unified messaging integrates with the telephony systems, operating fundamentally as a voicemail server using the Exchange Information Store as a repository for the messages.
Exchange Server 2010 extends the UM features first introduced in Exchange 2007. Unified messaging seamlessly integrates voice messaging, faxing, and electronic mail into a single inbox. This frees up the user from having to manage separate accounts and inboxes for these three types of messages. With the new role, there are a number of new features.