Use the Microsoft 365 network connectivity test to measure connectivity between your device and the internet, and from there to Microsoft’s network. Use the MIcrosoft 365 inventory scan troubleshooter to generate either a normal Troubleshoot Office 365 Sync and Login Issues or full scan report of your computer and installed Microsoft 365 applications. Use the Microsoft 365 sign-in troubleshooter to help resolve sign-in issues encountered with Microsoft 365. If you can't signinto your Microsoft account, most issues can be identified by our sign-in helper tool.

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 expert outlook Tips by fixtechguide typical sign-in and activation problems.

Recover your account

You can feel free to contact our experts, as they are available 24X7 for solving your issues. If your subscription has expired, your account is disabled, or your IT admin has blocked your account, in all these cases, you would not be able to log in to your account. Use the Microsoft 365 setup troubleshooter to install Microsoft 365, Office 2021, Office 2019, or Office 2016 on your Windows PC.

3 Step 3: Verify Network Connectivity and Firewall Settings

• Yes, Microsoft 365 works offline for most apps like Word and Excel.
• Use the uninstall troubleshooter to uninstall Microsoft 365, Office 2021, Office 2019, or Office 2016 from your Windows PC.
• 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

Use the Microsoft 365 activation troubleshooter to resolve Microsoft 365 subscription activation issues. Slow performance FixTechGuide Windows update Outlook fix can be due to heavy CPU usage or low available memory. Close unused tabs, background processes, or applications to free up system resources.