License & Subscription Issues

Fix Microsoft 365 Family Unlicensed Product & Sign-In Errors

Maira Mehtab Sep 20, 2026 869 views

Question details

A user is experiencing an 'Unlicensed Product' error and recurring sign-in requests after installing desktop applications from a Microsoft 365 Family sharing invite.

Product: Microsoft 365 Family
Device & OS: not provided
Scenario: Installing and activating Office desktop apps via a Family sharing invitation.
Observed behavior: The applications display an 'Unlicensed Product' warning and repeatedly ask for the user's username without successfully activating.

Before you start

Verify that your internet connection is stable and ensure you have completely logged out of any previous or expired Microsoft accounts in your default web browser before accepting the new invitation.

Solution 1Recommended

Accept the Invitation and Sign In with the Correct Account

This is the most common fix. You must officially accept the Family invitation to your personal Microsoft account before attempting to activate the downloaded desktop apps.

Accept the Family invitation

Open the email containing the Microsoft 365 Family sharing invitation and click the 'Accept' button to link the subscription to your personal Microsoft account.

Sign in to Microsoft 365 online

Navigate to www.microsoft365.com in your web browser and sign in using the exact same personal Microsoft account that received and accepted the invitation.

Activate the desktop apps

Open Word or Excel on your computer. When prompted to sign in, use the invited personal account credentials to activate the software and remove the 'Unlicensed Product' warning.

Solution 2

Reset Your Microsoft Account Password

If you have accepted the invitation but the desktop apps still refuse to authenticate your account, resetting your password can force a sync of your updated license status.

Free Microsoft Office alternative

Try WPS Office to Avoid Subscription and Activation Headaches

If Microsoft 365 activation issues persist and you need to edit documents immediately, consider switching to WPS Office. It provides a free, lightweight, and highly compatible alternative to Microsoft Office, letting you get right back to work without dealing with complex family sharing licenses.

1. Download the WPS Office installer: Visit the official WPS Office website and click the free download button for your operating system.
2. Install the software: Run the downloaded installer and follow the brief on-screen instructions to set up the suite on your computer.
3. Open your existing documents: Launch WPS Office and directly open your existing .docx, .xlsx, or .pptx files seamlessly.

Free to download and use for essential office tasksFully compatible with Microsoft Word, Excel, and PowerPoint formatsLightweight installation that won't slow down your deviceNo complicated family sharing subscriptions or activation errors to manage

microsoft office alternative - wps office

Frequently Asked Questions

Why does my Microsoft 365 app say Unlicensed Product?

This usually happens if your subscription has expired, you are signed in with the wrong account, or your desktop app hasn't properly synced your newly accepted Microsoft 365 Family invitation.

How do I accept a Microsoft 365 Family sharing invitation?

You need to open the email or sharing link provided by the subscription owner, click 'Accept', and sign in with your own personal Microsoft account to link the shared license to your profile.

Can I use a work or school account to accept a Family plan invitation?

No, Microsoft 365 Family invitations can only be accepted using a personal Microsoft account. Work or school accounts operate on an entirely different enterprise licensing system.

How do I check which account is signed into my Office desktop apps?

Open any Office application like Word, click on 'File' in the top left corner, and select 'Account' at the bottom left. Under 'User Information', you will see the currently signed-in email address.

Login & Account Issues