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How to Fix Microsoft 365 'This Site Cannot Be Reached' Error
Question details
The user needs to resolve an issue preventing them from accessing the Microsoft 365 web portal.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Attempting to access Office Online services by navigating to the m365.cloud.microsoft domain.
- Observed behavior
- The browser fails to load the web page and displays a 'This site cannot be reached' error message.
Verify that your device is connected to the internet by opening another common website, and ensure your router is functioning properly.
Switch to a Different Network Connection
Changing your internet connection helps determine if your current network's ISP, router, or DNS settings are blocking the Microsoft domain.
Network-specific issues are the most common cause of the 'This site cannot be reached' error. Bypassing your home or office network by using a mobile hotspot can quickly isolate the problem.
Click the network or Wi-Fi icon in your system tray and disconnect from your current Wi-Fi or wired network.
Open the settings on your smartphone and turn on the Mobile Hotspot or Personal Hotspot feature.
On your computer, select your phone's hotspot from the list of available Wi-Fi networks and connect to it.
Open your web browser and navigate to https://m365.cloud.microsoft to see if the page successfully loads.
Access the Site via an InPrivate or Incognito Window
Using a private browsing window helps rule out problems caused by corrupted cached data, invalid session cookies, or interfering browser extensions.
Use WPS Office for Uninterrupted Offline Work
When Microsoft 365 cloud services are unreachable due to network issues, WPS Office offers a lightweight, highly compatible desktop alternative. You can create, edit, and save documents entirely offline without worrying about browser errors or internet connectivity drops.
- 1. Download the software: Visit the official WPS website and download the free WPS Office installer for your operating system.
- 2. Install WPS Office: Run the downloaded installer and follow the on-screen prompts to complete the installation process.
- 3. Open your files locally: Launch WPS Office and directly open your existing Microsoft Word, Excel, or PowerPoint files from your local hard drive.
Frequently Asked Questions
Why does m365.cloud.microsoft say this site cannot be reached?
This error typically occurs due to local network connectivity issues, DNS resolution failures, or a corrupted browser cache preventing your device from establishing a secure connection to Microsoft's cloud servers.
Is the Microsoft 365 portal currently down?
While possible, widespread server outages are less common than local network problems. You can check the official Microsoft 365 Service Health status page on a different device (like your phone on cellular data) to verify if there is an ongoing outage.
How do I clear my browser cache to fix Microsoft 365 login errors?
In most major web browsers like Chrome or Edge, you can press Ctrl+Shift+Delete to open the 'Clear browsing data' menu. Select 'Cookies and other site data' as well as 'Cached images and files', then click 'Clear data'.
Will changing my DNS fix the 'site cannot be reached' error?
Yes, if your Internet Service Provider is having DNS lookup issues, switching your computer's DNS server to a reliable public DNS, such as Google DNS (8.8.8.8) or Cloudflare (1.1.1.1), can often resolve domain resolution issues preventing access to the site.
