To integrate Office Communications Server with Exchange Unified Messaging, you must run the Exchange UM Integration Utility (OCSUMUtil.exe). The utility has two functions:

The tool is installed on Office Communications Server, Front End Server, at %programfiles%\Microsoft Office Communications Server 2007 R2\Support\ocsumutil.exe.

To run the Exchange UM Integration Utility
  1. On a Server Front End Server, open a Command Prompt window, and then go to C:\ProgramFiles\Common Files\Microsoft Office Communications Server 2007 R2\Support\.

  2. At the command prompt, go to the location of the utility. Type Ocsumutil.exe, and then press ENTER.

  3. Click Load Datain order to find all trusted Exchange forests.

  4. In the SIP Dial Planslist, select a UM SIP dial plan for which you want to create contact objects, and then click Add.

  5. In the Contactbox, accept the default organizational unit, or click Browseto start the OU Picker. In the OU Pickerbox, you can select an OU and then click OK, or you can click Make New OUto create a new organizational unit under the root or any other OU in the domain (for example, "OU=RTC Special Accounts,DC=fourthcoffee,DC=com"), and then click OK.

  6. In the Namebox, either accept the default dial plan name or type a new user-friendly name for the contact object that you are creating. For example, if you are creating a subscriber access contact object, you might simply name it Subscriber Access.

  7. In the SIP Addressbox, either accept the default SIP address or type a new SIP address. If you type a new address, it must begin with sip:.

  8. In the Server or Poollist, select the Standard Edition server or Enterprise pool in which the contact object is to be enabled, preferably the pool where users who are enabled for Enterprise Voice and Exchange UM are homed.

  9. In the Phone Numberlist, select either Enter phone numberor Use this pilot number from Exchange UM, and then enter a phone number.

  10. In the Contact Typelist, select the contact type that you want to create, and then click OK.

You should create at least one contact for each auto attendant. If you want external access, you also need a Subscriber Access contact and to specify Direct Inward Dial (DID) numbers.

To verify that the contact objects have been created, open Active Directory Users and Computers and select the OU in which the objects were created. The contact objects should appear in the details pane.