Detected Office 2019 C2r Retail Could Not Be Converted To Volume ((free)) Site

If the required volume licensing certificates (SKU IDs) for Office 2019 are missing from the script's internal database, the conversion will fail.

The script might not recognize the specific build of Office 2019 you have installed, especially if it is a heavily modified or "Home & Student" edition. If the required volume licensing certificates (SKU IDs)

1. Official Method: Reinstall via Office Deployment Tool (ODT) Official Method: Reinstall via Office Deployment Tool (ODT)

If you need to move from a retail installation to a volume license, you can try the following methods: Why This Error Occurs The conversion process fails

Get the Office Deployment Tool from Microsoft .

The error message typically occurs when using third-party activation scripts or conversion tools (such as KMS_VL_ALL or C2R-R2V-AIO ). This specific error indicates that the automation script found a "Click-to-Run" (C2R) retail installation but was unable to swap its licensing certificates for Volume License (VL) versions required for KMS activation. Why This Error Occurs The conversion process fails for several common reasons: