How to Troubleshoot Intermittent SharePoint Access Denied Errors
Question details
The user needs to resolve random SharePoint Access Denied errors that affect multiple users even though site permissions appear to be correct.
- Product
- Microsoft SharePoint Online / Microsoft 365
- Device & OS
- not provided
- Scenario
- Multiple users can sometimes open SharePoint sites and files, but occasionally receive Access Denied errors across different users and folders.
- Observed behavior
- Access Denied appears intermittently; the site works in a private browser session, and the problem is not limited to a specific folder.
Before troubleshooting, make sure each affected user is signing in with the same Microsoft 365 account that was granted SharePoint access, and have one user test the exact affected URL in a private browsing window to isolate browser-cached credentials.
Test the SharePoint site in a private browser window
Use this first to determine whether stale cookies or authentication tokens are causing the random Access Denied errors.
Private browsing ignores existing cookies and cached credentials, so it isolates browser-side authentication state from the SharePoint site behavior.
In Microsoft Edge, select Settings and more (three dots) and choose New InPrivate window; in Chrome, select the three-dot menu and choose New Incognito window.
Enter the exact SharePoint site or file URL that returned Access Denied and attempt to open the same item.
If the site works in private browsing, stale cookies or cached credentials are likely the cause; proceed to clear them and sign in again.
Clear browser cookies, cached credentials, and sign in again
Use this when SharePoint opens in private browsing or when only some users are affected.
Ask the Microsoft 365 administrator to check service health, authentication logs, and permissions
Use this when the issue affects multiple users or multiple SharePoint sites and private browsing does not consistently resolve it.
Use WPS Office as a Lightweight Microsoft Office Alternative
SharePoint Access Denied errors are controlled by Microsoft 365 authentication and permissions, so WPS Office cannot change those settings. For users who need a free, lightweight Office alternative, WPS Office opens and edits Word, Excel, and PowerPoint files with high compatibility, a familiar ribbon interface, and a simple migration path once access is restored.
- 1. Download WPS Office Free: Go to the official WPS Office website and select Download WPS Office Free to install it on your Windows or macOS computer.
- 2. Open Microsoft Office files: Launch WPS Office, click Menu in the top-left corner, choose Open, and browse to a Word, Excel, or PowerPoint file saved locally or synced from SharePoint.
- 3. Edit and save with compatibility: Use the familiar Home, Insert, and Review tabs to edit content, then save the file in its original Microsoft Office format.
Frequently Asked Questions
Why does SharePoint show Access Denied even when users have correct permissions?
Access Denied can be caused by stale browser cookies, expired or cached authentication tokens, conditional access policies, tenant-level service issues, or permission changes that have not fully propagated.
Should I use a private browser session to test SharePoint access?
Yes. Open an InPrivate or Incognito window, go to the exact SharePoint URL, and try the same file or folder. If it works there, the issue is likely local browser credentials or cookies.
How do I clear browser cookies and cached credentials for SharePoint?
In Edge or Chrome, open Settings > Privacy, search, and services > Clear browsing data, select Cookies and other site data and Cached images and files, then clear and restart the browser.
When should the Microsoft 365 administrator open a support ticket?
Open a ticket when the issue affects multiple users or sites, service health shows no known incident, sign-in logs show unexpected failures, or the problem continues after clearing browser credentials.
Does WPS Office fix SharePoint Access Denied errors?
No. WPS Office cannot change SharePoint permissions or Microsoft 365 authentication. It is a free Microsoft Office alternative for editing Word, Excel, and PowerPoint files once SharePoint access is restored.
