How To Fix Microsoft Office Ltsc Professional Plus 2021 Preview Has Expired Patched May 2026

How to Fix "Microsoft Office LTSC Professional Plus 2021 Preview Has Expired"

After the preview is gone, you have three primary paths forward: Overview of Office LTSC 2024 - Microsoft Learn How to Fix "Microsoft Office LTSC Professional Plus

Step 2: Download the Official Version

Activation:

Requires a Volume License Key (VLK) or Multiple Activation Key (MAK) from the Microsoft Microsoft 365 Admin Center. Option B: Office Home & Business 2021 (Retail) Press Windows + R , type regedit , and press Enter

  1. Press Windows + R, type regedit, and press Enter.
  2. Navigate to: 
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\Configuration
  3. Look for a string value named ProductReleaseIds. If it includes ProPlus2021Preview or LTSCProPlus2021Preview, double-click it and delete those specific IDs.
  4. Also check: 
    HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Office\16.0\Common\Licensing
  5. Delete any subkey containing "Preview" or "Expired."

You cannot simply "update" a preview build to a full retail version; it must be completely removed first. Look for a string value named ProductReleaseIds

Q: Is there a free alternative?

A: Yes. If you cannot buy Office, consider installing LibreOffice (free, open-source) or using the Microsoft 365 Web Apps (Word/Excel for free in your browser).

Option A: Perpetual License.

Buy a one-time purchase of Office LTSC Professional Plus 2021 for a permanent, non-subscription version.

A:

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

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