Why Is SharePoint Online Slow Across the Tenant and How to Investigate
Question details
The user needs to determine why SharePoint Online is slow across modern sites in a tenant and how to escalate a tenant-wide performance issue when no configuration changes were made.
- Product
- Microsoft SharePoint Online
- Device & OS
- not provided
- Scenario
- SharePoint Online modern sites are slow across the tenant while other websites work normally, and no customizations or configuration changes were made.
- Observed behavior
- Page loads, the Settings icon, and search take a long time across modern SharePoint sites, and performance is sometimes essentially unusable.
Before opening a Microsoft support ticket, verify that the slowness affects multiple SharePoint Online modern sites and different users or networks. Use an InPrivate or Incognito browser session and a different network if possible to help separate tenant-wide service issues from local browser or connectivity problems.
Confirm the slowdown is tenant-wide and not a local client issue
Use this first when SharePoint Online feels slow, to rule out browser, network, or device-specific causes before treating it as a tenant-wide problem.
In a web browser, open several different modern SharePoint Online sites used by your organization and check whether pages, the Settings icon, and search are slow in each one.
Open a new InPrivate or Incognito window, sign in to SharePoint Online, and compare page load speed to rule out browser cache or extension issues.
Connect from a different network or use another computer to open the same SharePoint Online site and see whether performance improves, which can indicate a local network or endpoint problem.
Go to the Microsoft 365 admin center or Service health page and check whether SharePoint Online has an active incident or advisory that matches the slowdown.
Check Microsoft 365 service health for SharePoint Online
Use this to see if Microsoft has already reported a SharePoint Online service incident that explains tenant-wide slowness.
Ask your Microsoft 365 administrator to open a Microsoft support ticket
Use this when multiple SharePoint Online modern sites are slow, no configuration changes were made, and service health does not show an incident; Microsoft can review backend logs.
WPS Office as a Lightweight Alternative for Everyday Document Work
While WPS Office does not manage SharePoint Online performance, it is a free, lightweight Microsoft Office alternative for everyday Word, Excel, and PowerPoint documents, with full compatibility for .docx, .xlsx, and .pptx files and a familiar ribbon interface that makes migration simple.
- 1. Download WPS Office Free: Go to https://www.wps.com and click Download WPS Office Free to install the suite on your Windows, macOS, Android, or iOS device.
- 2. Open your existing Microsoft Office documents: Launch WPS Office and open Word, Excel, or PowerPoint files in .docx, .xlsx, or .pptx format so you can continue working with familiar documents.
- 3. Save in Microsoft-compatible formats: Use Save As to keep documents in .docx, .xlsx, or .pptx format when you need to share them back to Microsoft Office or SharePoint Online.
Frequently Asked Questions
How do I know if the SharePoint Online slowdown is tenant-wide or just my computer?
Open several different modern SharePoint sites in a private browser window and from another network or device. If pages, the Settings icon, and search are slow everywhere, the issue is more likely tenant-wide; if it improves, check your browser extensions, cache, network, or endpoint.
Where can my Microsoft 365 admin check for a SharePoint Online incident?
In the Microsoft 365 admin center, select Health, then Service health, and choose SharePoint Online. Active advisories and incidents that mention degraded performance or slow page loads appear there with status updates.
What should be included in a Microsoft support ticket for SharePoint Online slowness?
Include the affected modern site URLs, the time the slow performance started, browser and device details, whether it affects all users or sites, and a description of the slow elements such as Settings, search, and page load times.
Can WPS Office fix SharePoint Online tenant performance?
No. Tenant-wide SharePoint Online performance issues are handled by Microsoft 365 support. WPS Office can still be used as a free, lightweight alternative for editing Word, Excel, and PowerPoint files locally.
Do we need to change SharePoint Online settings before opening a ticket?
If no customizations or configuration changes were made and the slowdown affects multiple modern sites, you do not need to change SharePoint settings. Microsoft support can review backend logs and service health once the administrator submits a service request.
