To Volume | Detected Office 2019 C2r Retail Could Not Be Converted

Attempting third-party “retail-to-volume” conversion on Office 2019 C2R can:

A Retail installation contains different license tokens and product IDs than a Volume installation. The OSPP (Office Software Protection Platform) client checks these internal IDs. If it detects a Retail product ID but the user is trying to inject a Volume license key, it throws the error: "Could not be converted." Through Group Policy Management

Microsoft has intentionally designed Office 2019 C2R so that you cannot simply change the key via control panel. You cannot turn a Retail installation into a Volume installation without wiping the product clean. configure: Computer Configuration &gt

Through Group Policy Management, configure: Computer Configuration > Administrative Templates > Microsoft Office 2019 > Licensing Settings Set "Prevent installation of Retail licensed versions" to Enabled. Administrative Templates &gt

Before deploying Office 2019 Volume, run a PowerShell script to check for existing Retail artifacts:

Get-WmiObject -Class Win32_Product | Where-Object $_.Name -like "*Office 2019*" | ForEach-Object 
    if ($_.IdentifyingNumber -like "*Retail*") 
        Write-Host "Retail detected. Aborting Volume install."
        exit 1