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 Get-UMMailbox cmdlet to display the Unified Messaging (UM) properties for a UM-enabled recipient.

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

Get-UMMailbox [-Anr <String>] <COMMON PARAMETERS>
Get-UMMailbox [-Identity <MailboxIdParameter>] <COMMON PARAMETERS>
COMMON PARAMETERS: [-AccountPartition <AccountPartitionIdParameter>] [-Credential <PSCredential>] [-DomainController <Fqdn>] [-Filter <String>] [-IgnoreDefaultScope <SwitchParameter>] [-Organization <OrganizationIdParameter>] [-OrganizationalUnit <OrganizationalUnitIdParameter>] [-ReadFromDomainController <SwitchParameter>] [-ResultSize <Unlimited>] [-SortBy <String>]

This example displays a list of all the UM-enabled mailboxes in the Active Directory forest in a formatted list.

Get-UMMailbox | Format-List

This example displays the UM mailbox properties for

Get-UMMailbox -Identity

The Get-UMMailbox cmdlet retrieves the Unified Messaging properties for a single UM mailbox. It can also return a list of UM-enabled mailboxes.

After this task is completed, you can see the properties and values configured on a single UM mailbox. Or, if the Identity parameter isn't used, the cmdlet returns a list of all the UM-enabled mailboxes in a forest.

When running in an environment with Exchange Server 2007 and Exchange Server 2013 where the user’s mailbox is located on an Exchange 2007 Mailbox server, running the Get-UMMailbox cmdlet on an Exchange 2013 server won’t work correctly. To resolve the issue, run the Get-UMMailbox cmdlet from an Exchange 2007 server or a computer running the Exchange 2007 administrative tools.

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 AccountPartitionparameter is reserved for internal Microsoft use.




The Anr parameter specifies a string on which to perform an ambiguous name resolution (ANR) search. You can specify a partial string and search for objects that have an attribute that matches that string. The following default attributes are searched:

  • CommonName (CN)

  • DisplayName

  • FirstName

  • LastName

  • Alias




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

The Credential parameter specifies the user name and password to use to access Active Directory.




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 retrieves data from Active Directory.




The Filter parameter filters the results returned by the cmdlet.




The Identity parameter specifies the user to enable for Unified Messaging. The values for this parameter include the following:

  • ADObjectID

  • GUID

  • Distinguished name (DN)

  • Domain\Account

  • User principal name (UPN)

  • LegacyExchangeDN

  • SmtpAddress

  • Alias




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.

  • You can't use the OrganizationalUnit and Identity parameters together.

  • You can't use the Credential parameter.




The Organization parameter is reserved for internal Microsoft use.




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

The OrganizationalUnit parameter specifies an organizational unit (OU) and is used to limit the results. If you use this parameter, you retrieve only mailboxes in the container you specify. You can use the OU or the domain name. If you use the OU, you must specify the canonical name of the OU.




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

The ReadFromDomainController parameter specifies that the user information is read from a domain controller in the user's domain. If you've set the recipient scope to include all recipients in the forest and if you don't use this parameter, the user information may be read from a global catalog whose information is outdated. If you do use this parameter, multiple reads may be necessary to get the information. By default, the recipient scope is set to the domain that hosts your Exchange servers.




The ResultSize parameter specifies a maximum number of results to be returned. Otherwise, a maximum number isn't specified, and the command returns all results.




The SortBy parameter specifies the attribute by which to sort the results. You can sort by only one attribute at a time. You can sort by the following attributes:

  • Alias

  • DisplayName

  • Name

The results are sorted in ascending order.

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.