This worklet will help migrate 32-bit version of Microsoft Office to 64-bit version.

Need to download Release history for Office Deployment Tool (ODT) - Office release notes | Microsoft Docs and open to get a copy of setup.exe

Next create an XML file called configuration-Ofice365-x64-MigrateArch.xml

<Configuration>


  <Add OfficeClientEdition="64" MigrateArch="TRUE" Channel="Monthly" AllowcdnFallback="TRUE">


    <Product ID="O365ProPlusRetail">


      <Language ID="en-us" />


    </Product>


  </Add>


   <Display Level="None" AcceptEULA="TRUE" />  


  <Logging Level="Standard" Path="C:\windows\temp" /> 


</Configuration>

Upload both setup.exe and configuration-Ofice365-x64-MigrateArch.xml to the worklet.

Evaluation

$workdir = "C:\ProgramData\Amagent\O365"


IF(Test-Path $workdir){ Remove-Item $workdir -recurse -force | out-null }





$scriptblock = {


    Get-ItemProperty HKLM:\SOFTWARE\Microsoft\Office\ClickToRun\Configuration -Name Platform | Select-Object Platform


}


# Run the scriptblock and store results in the $64bit variable


$platform = & "$env:SystemRoot\sysnative\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -NonInteractive -Command $scriptblock





IF($platform.platform -eq 'x86'){


    Exit 1


}else{


    Exit 0


}

Remediation

$scriptblock = {


    Get-ItemProperty HKLM:\SOFTWARE\Microsoft\Office\ClickToRun\Configuration -Name Platform | Select-Object Platform


}


# Run the scriptblock and store results in the $64bit variable


$platform = & "$env:SystemRoot\sysnative\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -NonInteractive -Command $scriptblock





IF($platform.platform -eq 'x86'){


  # Setup Working Directory


  $workdir = "C:\ProgramData\Amagent\O365"


  IF(!(Test-Path $workdir)){mkdir $workdir | Out-Null}


  # Copy setup files


  Write-Host "Setup working directory at $workdir."


  Copy-Item configuration-Office365-x64-MigrateArch.xml $workdir | Out-Null


  Copy-Item setup.exe $workdir | Out-Null


  # Migrate Office from 32-bit to 64-bit


  Write-Host "Running Command $workdir\setup.exe /Configure configuration-Office365-x64-MigrateArch.xml."


  Start-Process "$workdir\setup.exe" -ArgumentList "/Configure configuration-Office365-x64-MigrateArch.xml" -Wait





}else{


    write-output "Detected $($platform.platform) as installed. Not running." 


}