Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007
Topic Last Modified: 2009-04-08

This topic explains how to add, remove, or modify extension numbers for a recipient who is enabled for Microsoft Exchange Server 2007 Unified Messaging (UM). If you have the release to manufacturing (RTM) version of Exchange Server 2007 installed, use the Exchange Management Shell to perform this procedure. If you have Exchange Server 2007 Service Pack 1 (SP1) installed, use the Exchange Management Shell or the Exchange Management Console.

Note:
In the RTM version, you must use the Set-Mailbox cmdlet to add, remove, or modify extension numbers.

When you enable a user for Unified Messaging, you must define at least one extension number that Unified Messaging will use when voice mail is submitted to the user's Exchange 2007 mailbox. After you have enabled the user for Unified Messaging, you can add extension numbers to the user's mailbox, or modify or remove them by configuring the Exchange Unified Messaging proxy address (EUM proxy address) on the user's mailbox.

Note:
There is no limit to the number of secondary extension numbers that you can add for a UM-enabled user.

There may be times when a user wants to receive voice mail on one Direct Inward Dial (DID) extension number and to receive faxes on a different DID extension number. To achieve this, you must add an additional DID extension to the user's mailbox. After you add this second extension number to the user's mailbox, when a voice call is received by a Unified Messaging server, the voice call will be forwarded to one extension number and when a fax call is received, the fax call will be sent to the second DID number. If you want a Unified Messaging server to answer these fax calls and send them to the second DID extension number, you must configure the telephony equipment in your organization to forward the fax call to the second DID extension number.

The mailbox of a UM-enabled user can be associated with only one UM dial plan. However, the mailbox of a UM-enabled user can be assigned the following:

Note:
Each extension number must be unique within a dial plan.

For example, a UM-enabled user travels frequently from New York to Tokyo. The user's mailbox is associated with the New York dial plan and a single extension number is configured on the user's mailbox. A second extension number is configured on the user's mailbox for the Tokyo dial plan. When callers dial either extension number and leave a voice message for the user, the voice message will be delivered to the same UM-enabled mailbox.

You can also add, remove, and modify SIP and E.164 addresses. For more information about how to add, remove, and modify SIP and E.164 addresses, see the following topics:

Before You Begin

To perform the following procedures, the account you use must be delegated the Exchange Recipient Administrator role.

For more information about permissions, delegating roles, and the rights that are required to administer Exchange 2007, see Permission Considerations.

Also, before you perform these procedures, confirm the following:

  • The existing Exchange recipient has an Exchange 2007 mailbox.

  • The existing Exchange 2007 recipient is enabled for Unified Messaging.

  • A UM dial plan has been created.

  • A UM mailbox policy has been created.

  • The extension number that will be assigned to the UM user is valid according to the UM dial plan that is associated with the UM-enabled user.

Procedure

Exchange 2007 SP1

To use the Exchange Management Console to add, remove, or modify an extension number for a UM-enabled user

  1. In the console tree, expand Recipient Configuration, and then click Mailbox.

  2. In the result pane, select the mailbox for which you want to add a new extension number.

  3. In the action pane, under the mailbox name, click Properties.

  4. In <Mailbox User> Properties, click the E-Mail Addresses tab.

  5. To create a new e-mail address, under E-mail Addresses, perform one of the following tasks:

    • To add a new EUM proxy address, click the drop-down arrow next to Add, and then click EUM Address. In UM Address (Extension), in the Address/Extension box, type the extension number. In the Dial plan (Phone context) box, click Browse to locate the dial plan for the user.

    • To modify an existing EUM proxy address, select the appropriate EUM proxy address, and then click Edit. In UM Address (Extension), in the Address/Extension box, type the new extension number. In the Dial plan (Phone context) box, click Browse to locate a new dial plan for the user.

    • To remove an existing EUM proxy address, click Remove icon.

  6. Click Apply, and then click OK.

To use the Exchange Management Shell to add, remove, or modify an extension number for a UM-enabled user

  • To add an extension number for a user, run the following command:

    Copy Code 
    $mbx = Get-Mailbox tony.smith
$mbx.EmailAddresses +="eum:12345;phone-context=MyDialPlan.contoso.com"
$mbx | set-mailbox

  • To modify an extension number for a user, run the following:

    Copy Code 
    $mbx = Get-Mailbox tony.smith
$mbx.EmailAddresses.Item(0) ="eum:22222;phone-context=MyDialPlan.contoso.com"
$mbx | set-mailbox
    Note:
    You must determine the position of the EUM proxy address that you want to modify. To determine the position of the EUM proxy address, use the $mbx.EmailAddresses command. The first proxy address in the list will be 0.

  • To remove an extension number for a user, run the following:

    Copy Code 
    $mbx = Get-Mailbox tony.smith
$mbx.EmailAddresses -="eum:12345;MyDialPlan.contoso.com"
$mbx | set-mailbox

For more information about syntax and parameters, see Set-Mailbox or Get-Mailbox.

Exchange 2007 RTM

To use the Exchange Management Shell to add, remove, or modify an extension number for a UM-enabled user

  • To add an extension number for a user, run the following command:

    Copy Code 
    $mbx = Get-Mailbox tony.smith
$mbx.Extensions +=12345
$mbx | set-mailbox

  • To modify an extension number for a user, run the following command:

    Copy Code 
    $mbx = Get-Mailbox tony.smith
$mbx.Extensions.Item(0) =12346
$mbx | set-mailbox
    Note:
    You must determine the position of the extension number that you want to modify. To determine the position of the extension number, use the $mbx.Extensions command. The first extension number in the list will be 0.

  • To remove an extension number for a user, run the following command:

    Copy Code 
    $mbx = Get-Mailbox tony.smith
$mbx.Extensions -=12345
$mbx | set-mailbox

For more information about syntax and parameters, see Set-Mailbox (RTM) or Get-Mailbox (RTM).

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