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How to Fix Excel Sign-In Prompts and Unlicensed Product Errors
Question details
Users are experiencing continuous sign-in prompts and seeing a 'Non-commercial use - Unlicensed Product' message when trying to use Excel.
- Product
- Microsoft Excel
- Device & OS
- not provided
- Scenario
- Attempting to open, edit, or save spreadsheets in Microsoft Excel across one or multiple devices.
- Observed behavior
- Excel repeatedly asks for sign-in credentials and displays an 'Unlicensed Product' error in the title bar, which typically locks the application into a reduced functionality mode.
Ensure you have your correct Microsoft 365 or Office account credentials ready and confirm that your device is connected to a stable internet network before troubleshooting licensing issues.
Reset the Microsoft 365 Activation State and Re-sign In
This is the most effective method to clear corrupted license data that causes continuous sign-in loops on local devices.
Sometimes, cached credentials or expired license tokens get stuck in the system, preventing Excel from recognizing a valid subscription.
Open Excel, navigate to File > Account, and click 'Sign out'. Once signed out, close all Microsoft Office applications completely.
Open the Start menu, search for 'Credential Manager', and open it. Select 'Windows Credentials' and remove any saved credentials that contain 'MicrosoftOffice' in the name.
Use the Microsoft Support and Recovery Assistant (SaRA) tool or run the 'cscript ospp.vbs /dstatus' command in Command Prompt (Run as Administrator) to remove lingering product keys.
Restart your computer, open Excel, and sign in again using the correct work, school, or personal account associated with your active Microsoft 365 subscription.
Verify Tenant Licensing and Service Health (For IT Admins)
Use this solution if the 'Unlicensed Product' error is simultaneously affecting multiple users and devices across your organization.
Switch to WPS Office to Avoid Activation Errors
Tired of dealing with Microsoft Excel sign-in loops and 'Unlicensed Product' restrictions? WPS Office offers a powerful, free, and highly compatible alternative to Microsoft Office. Edit, create, and save your spreadsheets instantly without worrying about complex subscription licensing or continuous login prompts.
- 1. Download the software: Visit the official WPS website to download and install WPS Office for free.
- 2. Open your files: Launch WPS Spreadsheets and simply click 'Open' to select your existing Excel (.xlsx) files.
- 3. Work without interruptions: Start editing your spreadsheets immediately with full compatibility and zero activation prompt loops.
Frequently Asked Questions
Why does Excel keep asking me to sign in?
Repeated sign-in prompts usually occur when Excel's cached login credentials on your device become corrupted, or when there is a syncing failure between your local Office installation and the Microsoft 365 licensing servers.
What does 'Non-commercial use - Unlicensed Product' mean?
This message appears when Excel cannot verify an active Office subscription or license for your signed-in account. It forces Excel into a reduced functionality mode, meaning you can view files but cannot edit, create, or save them.
If multiple users in my company face this error, do they all need to reset their local devices?
Not necessarily. If the issue is widespread across multiple users in different locations, it is likely a tenant-level licensing issue or a global Microsoft service outage. An IT administrator should verify the organization's licenses and the Microsoft 365 service health dashboard before having individual users perform local resets.
