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Enable or Disable Calls from Users Who Are Not UM-Enabled for a UM-Enabled User

Applies to: Exchange Server 2010

Topic Last Modified: 2011-03-19

You can enable or disable calls from users who aren't enabled for Unified Messaging (UM). By default, Unified Messaging allows incoming calls from unauthenticated callers through an auto attendant to be transferred to UM-enabled users. With this option enabled, users from outside an organization can transfer calls to UM-enabled users.

If this setting has been disabled for a UM-enabled user, the user's mailbox can still be located using a directory search. However, if an external caller tries to transfer to the user, the system says, "I'm sorry, I am unable to transfer the call to this user." The caller is then transferred to the operator, if an operator has been configured on the auto attendant. If no operator has been configured on the auto attendant, the call is transferred to a dial plan operator, if one has been configured. If no operator extension has been configured on the speech-enabled auto attendant, the dual tone multi-frequency (DTMF) fallback auto attendant, or the dial plan, the system responds by saying, "Sorry. Neither the operator or the touchtone service are available."

Looking for other management tasks related to UM users? Check out Managing Unified Messaging Users.

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "UM mailboxes" entry in the Unified Messaging Permissions topic.

  1. In the console tree, click Recipient Configuration.
  2. In the result pane, select the user's mailbox.
  3. In the action pane, click Properties.
  4. On the Mailbox Features tab, click Unified Messaging, and then click Properties.
  5. On the Unified Messaging Properties page, do one of the following:
    • To enable calls from users who aren't UM-enabled, select the check box next to Allow UM calls from non-users.
    • To disable calls from users who aren't UM-enabled, clear the check box next to Allow UM calls from non-users.
  6. Click OK to accept your changes.

You need to be assigned permissions before you can perform this procedure. To see what permissions you need, see the "UM mailboxes" entry in the Unified Messaging Permissions topic.

This example prevents Tony Smith from receiving voice mails from callers who aren't UM-enabled.

Set UMMailbox -Identity tony@contoso.com -AllowUMCallsFromNonUsers None

This example allows Tony Smith to receive voice mails from callers who aren't UM-enabled.

Set UMMailbox -Identity tony@contoso.com -AllowUMCallsFromNonUsers SearchEnabled

For more information about syntax and parameters, see Set-UMMailbox.

After you enable or disable calls from users who aren't UM-enabled to a user who is UM-enabled, you may also want to:

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