How To Fix Microsoft Office Ltsc Professional Plus 2021 Preview Has Expired [hot] May 2026

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

replace the expired preview license with a valid full-version license or extend the trial period . Once the preview expires, the applications enter a read-only mode

, where you can only view or print documents but cannot create or edit them. 1. Activate with a Full License Key

If you have a legitimate full version of Office LTSC 2021, you do not necessarily need to uninstall the preview. You can activate it using a valid key. Microsoft Learn : Open any Office app (like Word) > Change Product Key . Enter your MAK (Multiple Activation Key) and select Via Command Prompt (Volume Licensing) Command Prompt as an administrator. Navigate to the Office folder: cd "\Program Files\Microsoft Office\Office16" Enter your product key: cscript ospp.vbs /inpkey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX cscript ospp.vbs /act University of Wisconsin–Madison 2. Reset the Trial Period (Temporary Fix)

If you need immediate access and do not have a key, you can reset the "grace period" (typically 30 days) using the Close all Office applications. File Explorer C:\Program Files\Microsoft Office\Office16 Program Files (x86) for 32-bit versions). Right-click on OSPPREARM.EXE and select Run as administrator Repeat this three times to ensure the counter resets. 3. Complete Reinstallation

If the preview version remains stuck in "expired" status despite trying new keys, you must perform a clean uninstall and reinstall the retail or full LTSC version. Uninstall Microsoft 365 or Office from a PC To fix the "Microsoft Office LTSC Professional Plus

What You Need:

• The official ODT from Microsoft.
• An XML configuration file designed to remove the preview.

Solution 2: Update Office LTSC Professional Plus 2021

Ensure that you're running the latest version of Office LTSC Professional Plus 2021. To update:

1. Open any Office application.
2. Click on the File tab and select Account.
3. Click on Update Options and select Update Now.

Q3: Is there a free alternative to avoid this error?

A: Yes. You can switch to LibreOffice, Google Workspace, or OnlyOffice. They do not expire. But if you need 100% compatibility with complex Office macros, you must buy a license.

Why Does This Error Occur?

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:

• Office LTSC Professional Plus 2021 Preview (Volume License version)
• Office 2021 Professional Plus Preview (Retail version)

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.

How to do it:

1. Close all Office apps.
2. Right-click the system clock → Adjust date/time.
3. Turn off "Set time automatically."
4. Manually set the date back to a point before the preview expired (e.g., if it expired Dec 1, 2024, set it to Nov 1, 2024).
5. Open Office and quickly export your documents.
6. Immediately revert the date to automatic and proceed with Method 1 or 2.

Do not rely on this for regular use. It will cause certificate errors on the web and break file timestamps. What You Need:

Method 4: Adjust System Date (Temporary Workaround Only)

If you need to access a critical document for a few minutes before performing the proper fix, you can trick the license check by changing your system date.

Important: This is a temporary emergency measure. It will break other applications (browsers, HTTPS websites, antivirus).

Method 1: The License Cleanup Script (Most Effective)

This method clears the expired license keys from your system’s registry and allows you to input a valid key.

Step 1: Open Command Prompt as Administrator

• Press Windows + X and select Terminal (Admin) or Command Prompt (Admin).

Step 2: Navigate to Office Installation Folder The official ODT from Microsoft

• For 64-bit Office on 64-bit Windows:

  cd “C:\Program Files\Microsoft Office\Office16”
  

• For 32-bit Office:

  cd “C:\Program Files (x86)\Microsoft Office\Office16”
  

Step 3: View Current Licenses

• Type: cscript ospp.vbs /dstatus
• You will see a list of installed product keys. Look for a key ending in the last 5 characters (e.g., -XXXXX).

Step 4: Remove the Expired Preview Key

• Type: cscript ospp.vbs /unpkey:XXXXX (Replace XXXXX with the last 5 characters from Step 3).

Step 5: Install a Valid Key

• Type: cscript ospp.vbs /inpkey:YOUR-PRODUCT-KEY-HERE
• (Replace with your actual purchased license key for Office LTSC 2021).

Step 6: Activate

• Type: cscript ospp.vbs /act
• Close the window. Your Office should now work perfectly.