To activate the Volume License Office version (Project or Visio), you must have a configured KMS host. This MS Office version is subscription-based and can be activated online only. This guide applies only for Microsoft Office 2021/2019/2016 under volume license excluding Microsoft 365 Apps for enterprise (ex- Office 365 ProPlus). Configure a KMS Host Server to Activate MS Office 2021, 2019, and 2016 To activate Office 2021 LTSC Volume License version, you can add support for the new version of Office to your KMS activation host. Enterprise customers can begin deploying the new Office 2021 LTSC on their computers side by side with previous versions of Office. The LTSC version is also for organizations with computers that don’t want to receive feature upgrades or connect to the Internet. The LTSC version of Office 2021 is for customers who don’t want to get the Microsoft 365 subscription-based version of Office.

In October 2021, Microsoft released the new non-subscription version of Office LTSC 2021 (along with Windows 11). A corporate KMS server makes it easy to activate volume editions of Microsoft products (such as Windows and Office) in an internal or isolated enterprise network without the need to provide direct access to Microsoft’s Internet activation servers for clients, and without using phone activation.

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