File Sharing Problems

How to Fix Excel Says You Are Not Signed In When Sharing a Workbook

Maira Mehtab Sep 27, 2026 869 views

Question details

The user is unable to share an Excel workbook because the application displays an error message stating they are not signed in, preventing the sharing process.

Product: Microsoft Excel
Device & OS: not provided
Scenario: Attempting to use the built-in sharing feature to collaborate on an Excel workbook with other users.
Observed behavior: Excel blocks the sharing functionality and prompts a 'You are not signed in' error, even if the user believes their Microsoft account is currently active and logged in.

Before you start

Before troubleshooting, ensure you have a stable internet connection and that your Excel workbook is saved to a supported cloud location like OneDrive or SharePoint, as local offline files cannot be shared directly via a live link.

Solution 1Recommended

Verify Account Sign-In and Office Activation Status

The most common cause of this error is an expired session token, a mismatched Microsoft account, or an inactive Microsoft Office license.

Excel relies on active authentication to share files securely. If your login session has timed out or your subscription requires renewal, the sharing features will be temporarily disabled.

Access Account Settings

Open your Microsoft Excel application. Click on 'File' in the top-left corner, then select 'Account' (or 'Office Account') at the bottom of the left sidebar.

Check User Information

Look under the 'User Information' section to verify that the correct Microsoft account is currently signed in. If it displays the wrong account or an authentication error, click 'Sign Out'.

Sign Back In

Restart Excel, navigate back to 'File' > 'Account', and click 'Sign In' to reconnect using the correct credentials associated with your OneDrive or SharePoint.

Confirm Product Activation

Under 'Product Information' on the right side of the screen, confirm that your Office subscription says 'Product Activated'. If it prompts for activation, follow the on-screen instructions to reactivate your license.

Quick Tip: Sometimes simply signing out, restarting your computer, and signing back in is enough to refresh the authentication token and restore sharing capabilities.

Solution 2

Ensure the Workbook is Saved to OneDrive or SharePoint

Excel's live sharing feature requires the workbook to be hosted on Microsoft's cloud services rather than your local hard drive.

Solution 3

Relink Connected Cloud Services in Excel

If Excel is failing to recognize your cloud storage due to a glitch, manually removing and re-adding the connected service can resolve the communication error.

Free Microsoft Office alternative

Avoid Sign-In and Activation Errors with WPS Office

If you are tired of Microsoft Excel's strict activation prompts, account sync issues, and sharing errors, switch to WPS Office. It is a highly compatible, free, and lightweight alternative that makes file sharing simple and hassle-free without complex cloud authentication barriers.

1. Download WPS Office: Download and install the free version of WPS Office from the official website.
2. Open Your Workbook: Open your existing .xlsx or .xls files directly in WPS Spreadsheet.
3. Share with Ease: Click the 'Share' button in the top right corner to instantly generate a sharing link or send the file via email.

Seamlessly open, edit, and save Microsoft Excel (.xlsx, .xls) files without any formatting loss.Easily share documents via simple links or direct email without restrictive cloud sign-in barriers.Free and lightweight software, avoiding the heavy system resource usage of Microsoft 365.Familiar spreadsheet user interface means zero learning curve for existing Excel users.

Frequently Asked Questions

Why does Excel say I'm not signed in when I clearly am?

This usually happens due to a temporary sync glitch between the Excel desktop app and Microsoft's authentication servers. It can also occur if the login token has expired or if there is a conflict between your Windows account and your Office account. Signing out and back in typically resolves this.

Can I use the Excel Share button for a workbook saved on my local desktop?

No, the built-in 'Share' button in Excel requires the file to be uploaded and synced to OneDrive or SharePoint. If you want to share a local file without uploading it to Microsoft's cloud, you must manually attach it to an email or messaging app.

How do I check if my Microsoft Office subscription is still active?

Open Microsoft Excel, click on 'File', and select 'Account' at the bottom left. Look under the 'Product Information' section on the right side of the screen. It will explicitly state 'Product Activated' if your license is valid, or prompt you with a warning if it has expired.

Document & File Issues