Enable permissions for file access and notifications within app settings. For syncing or email issues, verify your mobile connection or switch between WiFi and cellular data. Reinstall the app if problems persist using Microsoft’s compatibility Exchange connectivity diagnostic manuals. Larger files may cause a temporary slowdown, so ensure your device has adequate memory.

How do I fix the ‘Product Activation Failed’ error in Microsoft 365?

Additionally, ensure you’ve installed all available updates, as performance improvements are often included in patches. Regularly cleaning up your hard drive or upgrading hardware like RAM can also enhance performance. If you’ve tried all these steps and still can’t resolve the sign-in or activation errors, you may need more advanced troubleshooting. Completing the above steps resolves a large majority of Outlook sync help from FixTechGuide typical sign-in and activation problems.

Recover your account

Office 365 uses several internet endpoints and cloud services to authenticate users and validate licenses. If these connections are disrupted, sign-in and activation will fail. Use the Excel check troubleshooter to resolve Excel for Windows startup, hang, or crash issues. Get Help has troubleshooters for Microsoft 365 you can run for many common scenarios. These often help resolve issues without the need to contact support. If a troubleshooter is available for your issue, select Start to run that troubleshooter.

3 Step 3: Verify Network Connectivity and Firewall Settings

• If your account is compromised or hacked, use Microsoft’s sign-in helper to recover your account and reset your security settings.
• Yes, Microsoft 365 works offline for most apps like Word and Excel.
• If syncing is paused, resume it from the OneDrive system tray icon.
• In these scenarios, you’ll need more in-depth knowledge of Office 365 licensing, Azure Active Directory (Azure AD) configurations, or advanced policy settings.
• Other times, it might be network problems, conflicting versions of Office, or organizational security policies that block the authentication process.
• Look up the error code on the official Microsoft site for tailored steps.

You might find it simple, but the most common cause of login failure is entering the wrong username and password combinations. Below is a structured approach to diagnosing and resolving Office 365 sign-in or activation errors. Start with the basics and move toward more advanced methods only if necessary.

Microsoft 365 Troubleshooting – Quick Fixes for Common Problems

If you encounter this error – Sorry, we are having temporary server issues, then chances are that the issue lies at Microsoft’s end. Alternatively, you can use the browser’s incognito mode or private mode to check if the issue persists. If you would like to ask me another question in the future, you can add me as a favorite Expert. You'll have the option to do that on your \"My Questions\" page if you choose to rate our interaction or you can request me by name if you wish. You'll have the option to do that on your "My Outlook Login Issues Troubleshooting Questions" page if you choose to rate our interaction or you can request me by name if you wish.