Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1
Topic Last Modified: 2006-09-18

Unified Messaging combines voice messaging, fax, and e-mail messaging into one store that users can access from a telephone and a computer. Microsoft  Exchange Server 2007 Unified Messaging integrates Microsoft Exchange with telephony networks and brings the Unified Messaging features to the core of Exchange.

There are multiple methods that you can use to install the Unified Messaging server role on a computer that is running Exchange 2007. You can install the Unified Messaging server role on a single computer that has no other Exchange 2007 server roles installed or on a computer that is running another Exchange 2007 server role.

After you install the Unified Messaging server role, you must perform other tasks before the Unified Messaging server can process incoming calls.

• Perform post-installation tasks. For more information about the post-installation deployment tasks, see Post-Installation Tasks.
  
  
• Manage a Unified Messaging server. For more information about how to manage a Unified Messaging server, see Managing a Unified Messaging Server.
  
  

Although the operational status of the Unified Messaging server is set to enabled after installation, the Unified Messaging server maintains a logical status parameter that is used to control the operational status of the Exchange 2007 Unified Messaging server. The logical status parameter lets you stop call processing so that you can take the Unified Messaging server offline in a controlled way.

You can control the operational status of the Unified Messaging server by using the enable and disable commands in the Exchange Management Console and the Exchange Management Shell. There are three status modes for Unified Messaging servers:

• Enabled - Process all incoming calls.
  
  
• Disable immediately - Do not accept any new calls and drop all existing calls.
  
  
• Disable after completing calls- Do not accept any new calls but process all existing calls.
  
  

For More Information

To ensure that you are reading the most up-to-date information and to find additional Exchange Server 2007 documentation, visit the Exchange Server TechCenter.

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