inport

[Byte[]]$Data = Get-Content -Path "C:\internal-Rules.xml" -Encoding Byte -ReadCount 0
Import-TransportRuleCollection -FileData $Data

[Byte[]]$Data = Get-Content -Path "C:\external-Rules.xml" -Encoding Byte -ReadCount 0
Import-TransportRuleCollection -FileData $Data

external-Rules.xml

<?xml version="1.0" encoding="utf-16" standalone="yes"?>
<rules name="TransportVersioned">
  <rule name="組織外に送信" id="74666876-09cd-4f9e-8c9c-df91b8c341bb" format="cmdlet">
    <version requiredMinVersion="15.0.3.0">
      <commandBlock><![CDATA[New-TransportRule -Name '組織外に送信' -Comments '
' -Enabled $False -Mode Enforce -FromScope NotInOrganization -RejectMessageReasonText '組織外にメールを送信することはできません。' -RejectMessageEnhancedStatusCode '5.7.1']]></commandBlock>
    </version>
  </rule>
</rules>

internal-Rules.xml

<?xml version="1.0" encoding="utf-16" standalone="yes"?>
<rules name="TransportVersioned">
  <rule name="組織内に送信" id="74666876-09cd-4f9e-8c9c-df91b8c341bb" format="cmdlet">
    <version requiredMinVersion="15.0.3.0">
      <commandBlock><![CDATA[New-TransportRule -Name '組織内に送信' -Comments '
' -Enabled $False -Mode Enforce -FromScope InOrganization -RejectMessageReasonText '組織内にメールを送信することはできません。' -RejectMessageEnhancedStatusCode '5.7.1']]></commandBlock>
    </version>
  </rule>
</rules>