Some third-party tools claim to fix the expired preview error. However, use these tools at your own risk:
To fix the error, you must transition from the pre-release "Preview" version to the official, commercially released version of Office LTSC 2021 or another supported product.
For users with a valid LTSC 2021 volume license but who accidentally installed the preview.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Some third-party tools claim to fix the expired
Do not install multiple versions of Office on the same machine to prevent license conflicts.
Disclaimer: Attempting to bypass the expiration date through illicit methods (cracks/activators) is illegal and poses a security risk to your computer.
A: No. Your documents are saved separately on your hard drive or OneDrive. Uninstalling Office does not delete your .docx or .xlsx files. This public link is valid for 7 days
You must completely remove the expired preview to avoid licensing conflicts with the new installation.
Scroll down to . Click the three dots and select Uninstall . Method B: Clean Removal (Recommended)
Method 2: Uninstall Preview and Install Full Version (Recommended) Can’t copy the link right now
Open Command Prompt as an administrator and type net start osppsvc to ensure the Office Software Protection Platform is running properly.
Are you using this machine on a or as a personal home computer ?
If you are unable to obtain a perpetual license key for LTSC 2021, you may consider switching to a subscription-based model. Uninstall the expired preview. Install Microsoft 365 Apps for Enterprise. Sign in with your Office 365 credentials to activate. Conclusion
The error occurs because preview builds of Microsoft Office LTSC 2021 are time‑limited. Once the internal expiration date (typically 120–180 days after the preview’s release) is reached, Office enters a reduced‑functionality mode or blocks usage entirely. This report outlines detection methods and three viable solutions, ranging from clean removal to paid licensing.
