Edit C:\Windows\System32\ServerManagerInternal\RDManagement\Add-RDVirtualMachine.xaml

<Activity mc:Ignorable="sap" x:Class="RDWF.Add_RDVirtualMachine" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mpa="clr-namespace:Microsoft.PowerShell.Activities;assembly=Microsoft.PowerShell.Activities" xmlns:mv="clr-namespace:Microsoft.VisualBasic;assembly=System" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:r="clr-namespace:RDWF" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:s1="clr-namespace:System;assembly=System" xmlns:s2="clr-namespace:System;assembly=System.Xml" xmlns:s3="clr-namespace:System;assembly=System.Core" xmlns:s4="clr-namespace:System;assembly=System.ServiceModel" xmlns:sa="clr-namespace:System.Activities;assembly=System.Activities" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:sap="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System" xmlns:scg1="clr-namespace:System.Collections.Generic;assembly=System.ServiceModel" xmlns:scg2="clr-namespace:System.Collections.Generic;assembly=System.Core" xmlns:scg3="clr-namespace:System.Collections.Generic;assembly=mscorlib" xmlns:sd="clr-namespace:System.Data;assembly=System.Data" xmlns:sl="clr-namespace:System.Linq;assembly=System.Core" xmlns:st="clr-namespace:System.Text;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <x:Members>
    <x:Property Name="RDManagementServer" Type="InArgument(x:String)">
      <x:Property.Attributes>
        <RequiredArgumentAttribute />
      </x:Property.Attributes>
    </x:Property>
    <x:Property Name="CollectionAlias" Type="InArgument(x:String)">
      <x:Property.Attributes>
        <RequiredArgumentAttribute />
      </x:Property.Attributes>
    </x:Property>
    <x:Property Name="ProvisioningXML" Type="InArgument(x:String)">
      <x:Property.Attributes>
        <RequiredArgumentAttribute />
      </x:Property.Attributes>
    </x:Property>
  </x:Members>
  <sap:VirtualizedContainerService.HintSize>382,287</sap:VirtualizedContainerService.HintSize>
  <mva:VisualBasic.Settings>Assembly references and imported namespaces for internal implementation</mva:VisualBasic.Settings>
  <Sequence DisplayName="Add Virtual Machines" sap:VirtualizedContainerService.HintSize="342,247">
    <Sequence.Variables>
      <Variable x:TypeArguments="x:Int32" Default="3" Name="activityID" />
    </Sequence.Variables>
    <sap:WorkflowViewStateService.ViewState>
      <scg3:Dictionary x:TypeArguments="x:String, x:Object">
        <x:Boolean x:Key="IsExpanded">True</x:Boolean>
      </scg3:Dictionary>
    </sap:WorkflowViewStateService.ViewState>
    <mpa:InlineScript Command="import-module $env:windir\System32\ServerManagerInternal\rdmanagement;&#xD;&#xA;Start-RDVMRollout -Alias $using:CollectionAlias -ProvisioningXml $using:ProvisioningXML -ManagementServer $using:RDManagementServer -ActivityId $using:activityID" DisplayName="Script : Start-RDVMRollout" sap:VirtualizedContainerService.HintSize="320,123">
      <sap:WorkflowViewStateService.ViewState>
        <scg3:Dictionary x:TypeArguments="x:String, x:Object">
          <x:Boolean x:Key="IsExpanded">True</x:Boolean>
          <x:Boolean x:Key="IsPinned">False</x:Boolean>
        </scg3:Dictionary>
      </sap:WorkflowViewStateService.ViewState>
    </mpa:InlineScript>
  </Sequence>
</Activity>

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