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Applies to: Exchange Online, Exchange Online Protection, 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 Enable-TransportRule cmdlet to enable a specific transport rule for messages that pass through the Transport service on a Mailbox server.

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

Enable-TransportRule -Identity <RuleIdParameter> [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-Mode <Audit | AuditAndNotify | Enforce>] [-WhatIf [<SwitchParameter>]]

This example enables the transport rule Disclaimer-Finance.

Enable-TransportRule "Disclaimer-Finance"

This example enables the transport rule Require approval of messages to contoso.com in audit mode, so you can see how the rule would function by analyzing the related entries in message tracking logs.

Enable-TransportRule "Require approval of messages to contoso.com" -Mode Audit

You can turn specific transport rules on or off in your organization at any time using the Enable-TransportRule and Disable-TransportRule cmdlets. To learn more about transport rules, see Transport rules.

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 "Transport rules" entry in the Messaging policy and compliance permissions topic.


Parameter Required Type Description




The Identity parameter specifies the rule you want to turn on. Enter either the name or the GUID of the rule. You can omit this parameter label.




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, dc01.contoso.com.

The DomainController parameter isn't supported on Edge Transport servers. An Edge Transport server uses the local instance of Active Directory Lightweight Directory Services (AD LDS) to read and write data.




The Mode parameter specifies in which mode this rule will operate after it's turned on. Valid values for this parameter include:

  • Audit   The rule is turned on, and what would have happened if the rule was enforced is logged in message tracking logs. Exchange doesn't take any action that impacts the delivery of the message.

  • AuditAndNotify   The rule is turned on, and it operates the same way it would in Audit mode, but notifications are also enabled.

  • Enforce   The rule is turned on, and all actions specified in the rule are taken.

The default value is Enforce.




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.

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