For activation, LTSC versions usually utilize Key Management Service (KMS) or Multiple Activation Keys (MAK). This allows IT administrators to manage large-scale deployments across a corporate network without requiring each individual machine to sign into a personal Microsoft account. Security and Support
The 16.0.14332.xxxxx build number confirms this is the Volume License release of LTSC 2021. It is distinct from the C2R (Click-to-Run) retail versions. Microsoft Office LTSC 2021 PRO PLUS 16.0.14332....
This build is highly sought after because it is recent enough to be secure but old enough to avoid the recent bloat Microsoft has added to the 365 apps. If you have this ISO installed, you are on the "Long Term Servicing Channel," meaning your workflow is safe from disruption for the next 5 years. For activation, LTSC versions usually utilize Key Management
bundle includes Word, Excel, PowerPoint, Outlook, OneNote, and Teams, with available exclusively for Windows. Technical Details & Compatibility The major version for this release is It is distinct from the C2R (Click-to-Run) retail versions