SharePoint Document Issues

Fix SharePoint Files Inaccessible After Email Address Change

Bushra Parveen Oct 9, 2026 869 views

Question details

User cannot access externally shared SharePoint files after modifying their primary Microsoft 365 email address, even when the files are reshared.

How to Access SharePoint Files After Changing Email Address

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: Attempting to open externally shared files after a primary email address update.
Observed behavior: The system continuously requests authentication using the former email address, blocking access to the reshared files under the new account.

Before you start

Ensure you have your new Microsoft 365 email credentials ready and verify that the file owner has explicitly reshared the document to your updated email address.

Solution 1Recommended

Use an Incognito Window and Clear Browser Cache

Using a private browsing window bypasses cached login credentials, allowing you to verify if outdated session data is causing the login conflict.

Web browsers often save account tokens to keep you signed in. When an email address is changed, the browser may forcefully attempt to authenticate using the old token, causing a loop. Isolating the session in a private window confirms this issue.

Open a Private Window

Launch your web browser and open a private browsing session. Use an InPrivate window in Microsoft Edge (Ctrl + Shift + N) or an Incognito window in Google Chrome.

Sign In with New Credentials

Paste the URL of the shared SharePoint file into the address bar. When prompted to authenticate, manually enter your updated Microsoft 365 email address and password.

Clear Browser Cache

If the file opens successfully in the private window, return to your normal browser window. Go to the browser's settings, locate the privacy or history section, and clear your cache and cookies to permanently resolve the credential conflict.

Authentication Restored: Clearing the cache forces the browser to discard the old account token and generate a new one linked to your updated email address.

Solution 2

Contact Your Microsoft 365 Administrator

If clearing the cache does not resolve the issue, backend account synchronization might be stuck and requires administrative intervention.

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While resolving backend SharePoint access issues, consider using WPS Office as a lightweight, free alternative for your daily tasks. It offers full compatibility with standard document formats, allowing you to stay productive without authentication loops.

1. Download and Install: Visit the official WPS Office website and download the free desktop application for your operating system.
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3. Save and Share: Save your progress locally or use WPS Cloud to securely share links with your colleagues, bypassing complex external sharing permissions.

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Frequently Asked Questions

Why does SharePoint keep asking for my old email address?

Your web browser caches login tokens to keep you signed in. After an email change, the browser may automatically submit the stored token associated with your previous address, creating a mismatch that denies you access.

Will I lose access to previously shared files after an email change?

Typically, your access rights transfer once the email change synchronizes across Microsoft 365 servers. However, if the file was shared with you as an external guest, the sender might need to delete your old guest profile and re-share the file to your new address.

How do I clear the cache for a specific site without losing all my saved logins?

In Chrome or Edge, you can click the padlock icon next to the URL in the address bar, select 'Site settings' or 'Cookies and site data', and choose to clear data specifically for the SharePoint or Microsoft login domains.

Document & File Issues