Applies to: Exchange Server 2013

This topic no longer applies to the cloud-based service. It applies only to on-premises Exchange 2013. To see the current version of the topic that applies to the cloud-based service, change the (v=exchg.150) value in the URL to (v=exchg.160).

Use the Disable-UMMailbox cmdlet to disable Unified Messaging (UM) for a UM-enabled recipient.

For information about the parameter sets in the Syntax section below, see Syntax.

Disable-UMMailbox -Identity <MailboxIdParameter> [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-IgnoreDefaultScope <SwitchParameter>] [-KeepProperties <$true | $false>] [-WhatIf [<SwitchParameter>]]

This example disables Unified Messaging on the mailbox for tonysmith@contoso.com.

Disable-UMMailbox -Identity tonysmith@contoso.com

The Disable-UMMailbox cmdlet disables Unified Messaging for a Microsoft Exchange Server 2013 recipient who's currently UM-enabled. When the task is complete, Mailbox servers running the Microsoft Exchange Unified Messaging service no longer handle calls for the extension number associated with the mailbox. You can continue to use the Exchange mailbox for all other operations unrelated to Unified Messaging.

After this task is completed, the user is disabled for Unified Messaging and can't use the voice mail features found in Unified Messaging any longer.

You need to be assigned permissions before you can run this cmdlet. Although all parameters for this cmdlet are listed in this topic, you may not have access to some parameters if they're not included in the permissions assigned to you. To see what permissions you need, see the "UM mailboxes" entry in the Unified Messaging permissions topic.


Parameter Required Type Description




The Identity parameter specifies the user to disable for Unified Messaging. The variables for this parameter include the following:

  • ADObjectID

  • GUID

  • Distinguished Name (DN)

  • Domain\Account

  • User principal name (UPN)

  • LegacyExchangeDN

  • SmtpAddress

  • Alias




The Confirm switch causes the command to pause processing and requires you to acknowledge what the command will do before processing continues. You don't have to specify a value with the Confirm switch.




This parameter is available only in on-premises Exchange 2013.

The DomainController parameter specifies the fully qualified domain name (FQDN) of the domain controller that writes this configuration change to Active Directory.




This parameter is available only in on-premises Exchange 2013.

The IgnoreDefaultScope parameter instructs the command to ignore the default recipient scope setting for the Exchange Management Shell session and use the entire forest as the scope. This allows the command to access Active Directory objects that aren't currently in the default scope. Using the IgnoreDefaultScope parameter introduces the following restrictions:

  • You can't use the DomainController parameter. The command uses an appropriate global catalog server automatically.

  • You can only use the distinguished name for the Identity parameter. Other forms of identification, such as alias or GUID, aren't accepted.




The KeepProperties parameter specifies whether the mailbox and directory resident properties should be retained. If this parameter isn't included, the user's UM properties are retained.




The WhatIf switch instructs the command to simulate the actions that it would take on the object. By using the WhatIf switch, you can view what changes would occur without having to apply any of those changes. You don't have to specify a value with the WhatIf switch.

To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn’t accept input data.

To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn’t return data.