This product was requested via email and it was added in the catalog update.
There is a newer version of this product which is not in the catalogue.
https://www.adobe.com/au/solutions/ebook/digital-editions/download.html
Current in Catalogue: 4.5.8
Latest version: 4.5.10
https://adedownload.adobe.com/pub/adobe/digitaleditions/ADE_4.5_Installer.exe
This latest version has been failing to install under system context. We are still trying to find root cause.