A: No. Microsoft Support will tell you the same thing: conversion is not supported. They will guide you through a clean uninstall and reinstall.
You will need to create two configuration XML files: one for uninstalling retail and one for installing volume.
This typically happens because the tool cannot identify a compatible Volume SKU for the specific Retail product ID installed on your system. Common Reasons for Conversion Failure SKU Mismatch You will need to create two configuration XML
Click-to-Run is Microsoft’s modern streaming and virtualization technology used to install and update Office products. Unlike the older Windows Installer (MSI) technology, C2R allows for background updates, side-by-side installations, and faster deployment. Every copy of Office 2019, 2021, and Microsoft 365 Apps is a C2R product.
| Action | Result | |--------|--------| | Attempt direct conversion | ❌ Error: “could not be converted to volume” | | Uninstall Retail → Install Volume | ✅ Works, supported by Microsoft | | Use third-party converter | ⚠️ Unstable, unsupported, risky | Unlike the older Windows Installer (MSI) technology, C2R
The script typically skips conversion if it detects the Retail copy is already activated . These tools are designed to convert unactivated or trial versions only.
Mixing 32-bit and 64-bit components can lead to system-level errors during the conversion process. How to Fix the Conversion Error 1. Use a Dedicated Cleanup Tool C2R allows for background updates
If the Office Deployment Tool (ODT) did not download all necessary files, the conversion script may fail to find the required licensing certificates.
Ensure the script is executed with elevated privileges; otherwise, it cannot modify the necessary system licensing files.
Get-WmiObject -Class Win32_Product | Where-Object $_.Name -like "*Office 2019*" -and $_.IdentifyingNumber -like "*retail*"