This may re‑enable Office for a short grace period but does not convert preview to full version. Suitable only for data recovery before uninstalling.
Steps:
Now, let’s fix it.
This removes all preview components before deploying a perpetual or subscription license.
Steps:
The “Microsoft Office LTSC Professional Plus 2021 Preview has expired” error is a deliberate license restriction, not a malfunction. The only permanent fix is to uninstall the preview and deploy a properly licensed, non‑preview version of Office LTSC 2021 or migrate to a Microsoft 365 subscription. Temporary reactivation methods are unreliable and not suitable for business continuity.
Recommended vendor action: If you have a valid VLSC agreement, download the latest Office LTSC 2021 Professional Plus image and redeploy using the provided MAK/KMS key. This may re‑enable Office for a short grace
Licensing or LicensingStore.Licensing folder.A: Your KMS host might be serving a preview KMS key. Contact your admin to switch to the LTSC 2021 Volume License KMS key.
Before fixing the problem, it helps to understand it. Microsoft distributes "Preview" versions of Office to businesses and testers before the final release. These previews include: This removes all preview components before deploying a
These builds are designed to expire 30 to 180 days after installation. Once expired, Microsoft disables all editing features to push you toward a licensed, permanent version.