Fix One-Time Purchase License Error in Microsoft Office for Mac
Question details
The user is unable to use Microsoft Office applications on their Mac because the software incorrectly reports a one-time purchase license error and prompts for a new payment.
- Product
- Microsoft Office for Mac
- Device & OS
- macOS
- Scenario
- Attempting to open and use pre-purchased Word, Excel, or PowerPoint applications on a Mac.
- Observed behavior
- The applications lock the user out of editing features, displaying a one-time-purchase license error and requesting an unwarranted payment.
Ensure you have the exact email address and password for the Microsoft account used to purchase your Office license, and verify that your Mac is connected to the internet.
Verify Your Microsoft Account Services and Subscriptions
Check if your Microsoft account holds the correct Office license to ensure you are signing in with the right credentials on your Mac.
Often, licensing errors occur because users accidentally sign into Office with a different Microsoft account than the one used to make the original purchase.
Open a web browser and navigate to the Microsoft account Services & Subscriptions page.
Log in using the email address associated with your Office purchase.
Look under the 'Products you've purchased' section to confirm that your Office for Mac license is listed and active.
Open Word or Excel on your Mac, sign out of any incorrect accounts, and sign back in using the verified account credentials.
Run the Microsoft Office License Removal Tool
Clear old or corrupted license files on your Mac that might be conflicting with your current one-time purchase activation.
Reinstall Microsoft Office for Mac
If verifying the account and removing the license cache fails, reinstalling the software can resolve deep corruption issues preventing license detection.
Switch to WPS Office for Mac to Avoid Licensing Hassles
If you are locked out of your documents due to persistent Microsoft Office license errors, WPS Office provides a free, lightweight, and fully compatible alternative for Mac users. Avoid expensive one-time purchases and subscription paywalls while seamlessly editing your existing files.
- 1. Download the app: Visit the official WPS website and download the free WPS Office version for Mac.
- 2. Open your files: Launch WPS Office and open your existing Word, Excel, or PowerPoint documents directly.
- 3. Edit and save: Edit your files with full formatting compatibility and save them without any licensing interruptions.

Frequently Asked Questions
Why is my Mac asking me to buy Office again when I already purchased it?
This usually happens if your Office application is signed into a different Microsoft account than the one used for the original purchase, or if corrupted local license files are forcing the app to read an expired subscription.
Does the Microsoft license removal tool delete my documents?
No, the license removal tool only clears hidden activation and cache files on your Mac. Your personal Word, Excel, and PowerPoint documents will remain completely safe and untouched.
Can I use my one-time purchase of Office on a new Mac?
Yes, but a one-time purchase license can only be active on one computer at a time. You must first uninstall Office and remove the license from your old Mac before you can successfully activate it on the new one.
How do I check which Microsoft account holds my Office license?
Go to the Microsoft account Services & Subscriptions website and log in. Your active Office purchases, subscriptions, and download links will be clearly listed under your profile dashboard.




