What Should I Do If Office Apps in Microsoft 365 E3 Are Not Working Properly?

If Office apps in Microsoft 365 E3 are not functioning correctly, start by restarting the affected apps and checking for updates. If the issue persists, follow these troubleshooting steps to identify and resolve the problem effectively.
Step-by-Step Troubleshooting Guide
1. Restart the App and Device
- Close the affected Office app completely.
- Restart your computer or mobile device to refresh system resources.
- Relaunch the app and check if the issue is resolved.
2. Check for Updates
- Open any Office app and navigate to File > Account > Update Options > Update Now.
- Ensure you are using the latest version of Office apps to avoid known bugs.
3. Verify Your Microsoft 365 Subscription
- Log in to Microsoft 365 Admin Center.
- Confirm your subscription is active and assigned to the affected user account.
- Reassign licenses if necessary.
4. Run Office Repair
- Open the Control Panel on your Windows device.
- Go to Programs > Programs and Features.
- Select your Microsoft 365 installation and click Change.
- Choose Quick Repair first. If that doesn’t work, try Online Repair.
5. Clear Cached Files
- Navigate to
%localappdata%\Microsoft\Office\16.0\OfficeFileCache. - Delete all files in this folder to remove corrupt cache data.
- Restart your Office apps.
6. Check Network Connectivity
- Ensure your internet connection is stable.
- Test connectivity to Microsoft’s servers by visiting office.com.
- Troubleshoot network issues if the page doesn’t load properly.
7. Disable Add-Ins
- Open the affected Office app in Safe Mode by holding Ctrl while launching the app.
- Go to File > Options > Add-Ins.
- Disable all add-ins and restart the app. Re-enable them one by one to identify the problematic add-in.
8. Check System Requirements
- Verify that your device meets the minimum system requirements for Microsoft 365 E3.
- Check for outdated operating systems or insufficient hardware resources.
9. Reinstall Office Apps
- Uninstall Office from your device via the Control Panel.
- Download the latest installer from the Microsoft 365 portal.
- Reinstall and activate the apps.
10. Contact Support
- If none of the above steps work, contact Microsoft 365 Support.
- Use the Help > Contact Support option within any Office app to report the issue.
Preventing Future Issues
- Regularly update Office apps and your operating system.
- Monitor your Microsoft 365 subscription for renewals and license management.
- Ensure your device is free from malware and has sufficient storage space.
Need Professional Assistance?
Medha Cloud specializes in Microsoft 365 administration and support. Our team can resolve complex Office app issues quickly.
Boost productivity and security with Microsoft 365 E3 — enterprise-grade tools at competitive pricing.
Get Microsoft 365 E3Topics

Sreenivasa Reddy G
Founder & CEO • 15+ years
Sreenivasa Reddy is the Founder and CEO of Medha Cloud, recognized as "Startup of the Year 2024" by The CEO Magazine. With over 15 years of experience in cloud infrastructure and IT services, he leads the company's vision to deliver enterprise-grade cloud solutions to businesses worldwide.
More in Microsoft 365
View all
Microsoft 365 Cost Optimization: How to Cut Your Licensing Spend by 30% Without Losing Features
22 min read

Microsoft 365 Security Checklist: 100 Settings Every IT Administrator Must Review
20 min read

Microsoft 365 Security Hardening Guide: 50 Critical Settings Every Business Should Enable
25 min read
Defederate GoDaddy Microsoft 365 — Free GoDaddy to Microsoft 365 Migration Tool
35 min read
What Is Microsoft 365? Plans, Apps & Business Guide 2026
14 min read
How to Recall an Email in Outlook: Step-by-Step Guide (2026)
8 min read