If one of these resolves your problem, close the app and continue working. Use the Microsoft 365 shared computer activation (SCA) troubleshooter to enable shared computer activation for Microsoft 365 applications. If your account is locked due to multiple unsuccessful login attempts, wait for the lockout period to end.

Common Causes of Office 365 Sign-In and Activation Issues

Use the Microsoft 365 activation troubleshooter to resolve Microsoft 365 subscription activation issues. Slow performance can be due to heavy CPU usage or low available memory. Close unused tabs, background processes, or applications to free up system resources. Additionally, ensure you’ve installed all available updates, as performance improvements are often included in patches.

I can't sign in to my Microsoft account

Online guides from Microsoft provide extra steps to speed up slow applications. You have to follow a systematic approach while dealing with Microsoft 365 login issues. Start with the very basic checks and move to the more complex troubleshooting tips.

What should I do if updates for Microsoft 365 apps fail to install?

Clearing cached credentials, running a repair, or using the Microsoft Support and Recovery Assistant (SaRA) can also address common local device issues. Verify that you’re logged into the correct Microsoft account both in OneDrive and Office apps. If syncing is paused, resume it from the OneDrive system tray icon.

Frequently asked questions

If you can't sign into your Microsoft account, most issues can be identified by our sign-in helper tool. 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 FixTechGuide support for Office 365 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.

• Clearing cached credentials, running a repair, or using the Microsoft Support and Recovery Assistant (SaRA) can also address common local device issues.
• In this guide, we will take an in-depth look at troubleshooting and resolving common Microsoft 365 login problems so you can keep your business running smoothly.
• Start with the very basic checks and move to the more complex troubleshooting tips.
• Make sure your phone’s operating system is supported by Microsoft 365.
• Completing the above steps resolves a large majority of typical sign-in and activation problems.
• Use the Microsoft 365 setup troubleshooter to install Microsoft 365, Office 2021, Office 2019, or Office 2016 on your Windows PC.
• Verify that you’re logged into the correct Microsoft account both in OneDrive and Office apps.
• Additionally, check out the above-listed security best practices and keep your team members aware of common troubleshooting tips.

What can I do if I experience issues syncing emails in Outlook?

Yes, Microsoft 365 works offline for most apps like Word and Excel. Simply open the Office app normally, and all your files are saved locally until internet access resumes. For cloud-based services like Outlook or OneDrive, offline access won’t work until you sync online again. Make sure to save any updates for immediate syncing once a solve Office 365 mailbox sync delays connection is re-established. Always verify offline availability settings for critical documents you might need.

Step-by-Step Troubleshooting for Microsoft Office 365 Login Issues

According to a recent report, approximately 60% of Microsoft 365 users have experienced login issues at least once in the past year. This shows that the problem is widespread and it is affecting millions of users worldwide. For more advanced or persistent cases, reviewing Azure AD sign-in logs, double-checking MFA setups, or investigating Conditional Access policies may be necessary. And if your environment is particularly security-conscious, keep in mind that policy-based blocks on specific devices or geographic regions can also interfere with Office activation. If the license is valid and assigned correctly, the next steps involve checking network-related blocks and performing initial device-level troubleshooting.





Repair your Office installation through "Programs and Features" using its built-in fix tool. If freezing persists, reinstall the app using files downloaded from your account dashboard to rule out bugs. Keep cache sizes clear and refer to official Microsoft troubleshooting manuals for persistent app freezes.

Remove and fix Outlook after Windows update issues re-add your Office account within the app for reconnection. Start by verifying your subscription status to ensure it’s still active. Go to any Office app and ensure you’re signed in with the same Microsoft account linked to your license. Remove and re-add your account under the "Account" settings of the app if needed.