Security Policy Errors

How to Fix SharePoint or OneDrive Site Incorrectly Flagged as Harmful

Rana Garcia Oct 22, 2026 868 views

Question details

Users encounter Google Safe Browsing warnings stating that their legitimate SharePoint Online or OneDrive sites contain deceptive or malicious content.

How to Fix SharePoint or OneDrive Site Incorrectly Flagged as Harmful

Product: Microsoft SharePoint Online and OneDrive
Device & OS: not provided
Scenario: Accessing Microsoft 365 cloud storage links via Google Chrome or other browsers that utilize Safe Browsing services.
Observed behavior: The web browser completely blocks access to the SharePoint or OneDrive URL, displaying a prominent red warning screen that claims the site hosts harmful files.

Before you start

Ensure you have contact information for your organization's Microsoft 365 Administrator, as resolving service-level false positives requires backend access to the Microsoft 365 admin center.

Solution 1Recommended

Check Microsoft 365 Service Health for Known Incidents

Verify if there is an active Microsoft service incident causing false positive malware warnings across the network.

SharePoint Online, OneDrive, and Microsoft Teams share a common virus-detection service for scanning uploaded files. Occasionally, backend changes or false detections trigger Google Safe Browsing warnings (such as incident SP609345) across Chrome browsers.

Log in to Admin Center

Have your Microsoft 365 administrator log in to the Microsoft 365 admin center with their administrator credentials.

Navigate to Service Health

Go to the 'Health' section in the left navigation pane and select 'Service health'.

Check for Active Incidents

Look for active advisories or incidents related to SharePoint Online or OneDrive. Check if there are any ongoing issues matching the description of URLs being flagged as potentially malicious.

Check Microsoft 365 Service Health for Known Incidents

Wait for Resolution: If a known incident is posted, Microsoft engineering is already aware and working on a backend fix. You will need to wait for the service advisory to be resolved.

Solution 2

Open a Support Ticket with Microsoft

If no broad service incident is reported, request an individual backend investigation from Microsoft support.

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Frequently Asked Questions

Why is Google Chrome suddenly blocking my company's SharePoint site?

This typically occurs when Google Safe Browsing detects potentially harmful files hosted on the domain, or due to a false positive stemming from Microsoft's shared virus-detection backend service communicating incorrectly with browser security lists.

Can an end-user fix the 'harmful content' warning on OneDrive?

No, standard users cannot resolve domain-level false positives. You must contact your organization's Microsoft 365 Administrator so they can check the Service Health Dashboard or open a backend support ticket with Microsoft.

Are my files safe if this Google Safe Browsing warning appears?

In cases of known service incidents (like SP609345), this is purely a false detection and your files remain safe. However, administrators should still verify that no compromised or malicious files were recently uploaded to the shared site by an infected user device.

Microsoft Office Security Issues