Microsoft launches preview releases for Microsoft Office 2021 for Mac and Office LTSC for Windows. These are the next versions of non-subscription (aka perpetual) Office products made available only for commercial customers. Microsoft also added today that these preview releases are the first in a series of incoming launches for the Office on-premises wave, with commercial previews for SharePoint and Project Server to be announced in the coming months. These preview releases come with several new features already available in Microsoft 365 Apps for enterprise.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-first-non-subscription-office-2021-ltsc-previews/