The installation of LTSC for Mac generally follows a two-part process: installing the software and then activating it via the VL Serializer.
: To avoid conflicts, uninstall any existing Microsoft Office applications.
Microsoft Office LTSC for Mac 2021 (Version 16.55) is a specialized, volume-licensed version of the productivity suite designed for organizations that require a "locked-in" feature set without a subscription. Unlike standard retail versions, it does not receive new feature updates. Pre-Installation Requirements