Hi @Galbraith, Fleurette (CONTR)
Thanks for your detailed sharing.
The update channel PerpetualVL2019 is for volume license version of Office Professional Plus 2019, which Product ID is ProPlus2019Volume.
If your Office is retail version of Office Professional 2019, the product ID is Professional2019Retail, the update channel is Current. (Please note, the Channel attribute was changed, for more, you may refer to 'Channel attribute (part of Add element)'.)
I suggest you use one .xml file to download the installation package, and install Office updates.
Because, if you specific "PerpetualVL2019" update channel in .xml file to download the package, then the package is not suitable for retail version of Office Professional 2019.
You may try following .xml file.
<Configuration>
<Add SourcePath="C:\ODT Tool" OfficeClientEdition="64" Channel="Current">
<Product ID="Professional2019Retail">
<Language I="en-us"/>
</Product>
</Add>
<Display Level="Full" AcceptEULA="TRUE" />
</Configuration>
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