Applies to: Exchange Online, Exchange Server 2016

This cmdlet is available in on-premises Exchange Server 2016 and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.

Use the New-UMMailboxPolicy cmdlet to create a Unified Messaging (UM) mailbox policy.

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

New-UMMailboxPolicy -Name <String> -UMDialPlan <UMDialPlanIdParameter> [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-WhatIf [<SwitchParameter>]]

This example creates the UM mailbox policy MyUMMailboxPolicy associated with the UM dial plan MyUMDialPlan.

New-UMMailboxPolicy -Name MyUMMailboxPolicy -UMDialPlan MyUMDialPlan

The New-UMMailboxPolicy cmdlet creates a UM mailbox policy that has organization-wide scope. UM mailbox policies provide a set of policy values to be applied to UM-enabled users associated with a particular UM dial plan. UM mailbox policies are directly associated with UM dial plans. Therefore, the settings contained within a UM mailbox policy apply only to UM-enabled users of the UM dial plan that the UM mailbox policy is associated with. You can also use the New-UMMailboxPolicy cmdlet to create a UM mailbox policy template that can be used to create additional UM mailbox policies.

After this task is completed, a new UM mailbox policy is created.

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 mailbox policies" entry in the Unified Messaging permissions topic.


Parameter Required Type Description




The Name parameter specifies the display name for the UM mailbox policy. The name for the UM mailbox policy can contain as many as 64 characters.




The UMDialPlan parameter specifies the identifier for the UM dial plan to be associated with the UM mailbox policy. This parameter is the directory object ID for the UM dial plan.




The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

  • Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.

  • Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.




This parameter is available only in on-premises Exchange 2016.

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example,




The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this 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.