The Exchange UM Integration Utility (that is, Ocsumutil.exe) is a command-line tool that you can use to integrate Office Communications Server and Exchange Unified Messaging to enable Enterprise Voice messaging.

The tool has two functions:

You can use the tool in the following situations:

OCSUMUtil.exe is available in the %InstallDir%\Microsoft Office Communications Server 2007 R2\Server\Support\ directory on a computer on which Office Communications Server 2007 R2 is installed. For details about running the Exchange UM Integration Utility, see Step 3. Configure Communications Server to Work with Unified Messaging on Microsoft Exchange Serverin the Deploying Enterprise Voice documentation.

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