The "Pro Plus" edition is the highest tier of the Office suite, typically aimed at volume licensing customers but also available via retail channels. It includes the full stack of productivity applications:
"Retail" indicates that this specific version is intended for activation via a Retail Product Key, rather than a Volume License Key (VLK) or KMS activation.
This build offers both, and the installer automatically detects the system type or lets the user override the choice.
Since this is a Retail release, official activation requires a genuine retail key. After installation, the user can:
The version string you mentioned — Version 1808 Build 10730.20102 — refers to an early but stable build of Office 2019.
Microsoft’s current Office 2019 builds are much higher (e.g., 16.0.10402.20023 or later). Older builds like 10730.20102 lack security updates from the past several years.
