> ## Content Index > Fetch the complete content index at: https://todayfixtech.com/llms.txt > Use this file to discover other available public pages before exploring further. # How to Fix Common Issues with Microsoft 365 Web Apps - URL: https://todayfixtech.com/fix-common-issues-microsoft-365-web-apps/ - Published: 2026-10-10T11:55:04.000Z - Updated: 2026-10-10T11:55:04.000Z - Author: Md Sojib Mia - Tags: Microsoft, Troubleshooting [If Microsoft 365 web](https://todayfixtech.com/fix-microsoft-365-login-issues/) apps are not functioning properly, start by identifying the specific error messages or symptoms you see. Common solutions include checking your browser compatibility, clearing your browser cache and cookies, and ensuring your browser is up to date. Following these steps can help restore functionality quickly. ## What error messages are you seeing? Identifying the exact error message is crucial for troubleshooting. Some common error messages include: ```text Error: Service Unavailable Error: Connection Lost Error: Authentication Failed ``` Error These messages can appear due to server issues, network connectivity problems, or authentication errors. Knowing which message you're encountering can guide you toward the appropriate solution. ## Before you start This [guide applies to Microsoft](https://todayfixtech.com/microsoft-365-updates-features/) 365 web apps, including versions available in Microsoft 365 subscriptions. You need standard user privileges to clear the browser cache and cookies or update your browser. Before proceeding, ensure your internet connection is stable and try accessing the apps from another device to rule out device-specific issues. ## Is your web browser compatible? [Microsoft 365 web apps work](https://todayfixtech.com/microsoft-365-tips-tricks/) best with certain browsers and versions. Commonly supported browsers include: - Microsoft Edge - Google Chrome - Mozilla Firefox - Safari Before troubleshooting further, check your current browser version. An outdated browser may lead to compatibility issues. You can check your browser version in the settings or about section of the browser and ensure you are using the latest version. ## How to clear your browser cache and cookies Clearing your browser’s cache and cookies can resolve many issues. Here’s how to do it in popular browsers: ### Google Chrome 1. Open Chrome. 2. Click on the three dots in the top right corner. 3. Select 'More tools' > 'Clear browsing data'. 4. Choose 'Cookies and other site data' and 'Cached images and files'. 5. Click 'Clear data'. ### Microsoft Edge 1. Open Edge. 2. Click on the three dots in the top right corner. 3. Select 'Settings'. 4. Go to 'Privacy, search, and services'. 5. Under 'Clear browsing data', click 'Choose what to clear'. 6. Select 'Cookies and other site data' and 'Cached images and files', then click 'Clear now'. ### Mozilla Firefox 1. Open Firefox. 2. Click on the three lines in the top right corner. 3. Select 'Options'. 4. Go to 'Privacy & Security'. 5. Under 'Cookies and Site Data', click 'Clear Data'. 6. Check both options and click 'Clear'. After clearing the cache and cookies, restart your browser and try accessing Microsoft 365 web apps again. ## Have you tried updating your browser? Keeping your web browser updated is vital for optimal performance. To check for updates in: ### Google Chrome 1. Open Chrome. 2. Click on the three dots in the top right corner. 3. Select 'Help' > 'About Google Chrome'. 4. Chrome will automatically check for updates and install them if available. ### Microsoft Edge 1. Open Edge. 2. Click on the three dots in the top right corner. 3. Select 'Help and feedback' > 'About Microsoft Edge'. 4. Edge will check for updates automatically. ### Mozilla Firefox 1. Open Firefox. 2. Click on the three lines in the top right corner. 3. Select 'Help' > 'About Firefox'. 4. Firefox will check for updates automatically and prompt you to restart if there are updates available. ## What if problems persist? If you're still experiencing issues after trying the above fixes, consider the following troubleshooting steps: - Check your internet connection to ensure there are no connectivity problems. - Disable any browser extensions that might interfere with Microsoft 365 web apps. - Try accessing the apps from a different browser or device to see if the issue persists. - If problems continue, contacting Microsoft support may be necessary. They can offer additional guidance tailored to your specific situation. ## Conclusion After following these troubleshooting steps, your Microsoft 365 web apps should be functioning properly. If issues persist, consider reaching out to your IT support or Microsoft for further assistance. Keeping your software up to date and clearing your cache regularly can help prevent future issues. ## Frequently Asked Questions ### What should I do if I see a 'Service Unavailable' error? Check your internet connection and try refreshing the page. If the issue continues, it may be a server-side problem. ### How often should I clear my browser cache and cookies? Clearing your browser cache and cookies every few weeks can help maintain performance and avoid issues. ### Can I use Microsoft 365 web apps on mobile devices? Yes, Microsoft 365 web apps are compatible with mobile devices, but ensure you're using an updated browser for the best experience. ### What if I can't access Microsoft 365 web apps at all? Make sure your internet connection is stable, your browser is up to date, and try accessing the apps from a different device.