Hi @Kalina Savova Stoyanova,
Thank you for reaching out to the Microsoft Q&A forum.
I understand you’re experiencing a CONNECTFAILED error when using Outlook for Education on Windows, which can be difficult when you need reliable access.
Here are some steps to identify the cause and help you restore connectivity:
- Check internet connection
- Make sure your network connection is stable. Test by opening a web browser and visiting any website.
- Update Outlook
- Confirm that you’re running the latest version of Outlook. To check for updates: go to File → Update Options.
- Use Outlook web
- Try to use Outlook web to if the issue still persists.
- Clear Outlook cache
- Close the Outlook app.
- Press the Windows + R keys simultaneously to open the Run dialog box.
- Type the following path into the Run box and press Enter: %localappdata%\Microsoft\Outlook\RoamCache

- This will open the RoamCache folder containing the cache files associated with your Outlook profile. Usually, it's located at: C:\Users{User name}\AppData\Local\Microsoft\Outlook\RoamCache
- Click anywhere within the folder, press Ctrl + A to select all files, and then press the Delete key to remove them. Alternatively, you can right-click the selection and choose the Delete option from the context menu.

- After clearing the cache, restart Outlook again. It will rebuild the necessary cache files from scratch.
- Repair Outlook
- Open Control Panel > Programs > Programs and Features.
- Locate Microsoft Office, right-click it, and select Repair, then follow the on-screen instructions.
I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.
Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.
I look forward to your thoughts on this.
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