Activate

No. The preview framework ignores new keys. You must uninstall the preview first.

To fix the "Microsoft Office LTSC Professional Plus 2021 Preview has expired" error, you must

The following sections detail how to resolve this expiration. 1. Update the Product Key

Ensure that your system's date and time settings are correct:

For users who prefer a subscription model with constant feature updates, Microsoft 365 is the recommended alternative. 3. Troubleshooting Persistent License Errors