Have you been distracted so much by this Outlook error recently? Don't worry you're not the only one having this issue with Outlook. This is a very common issue with Outlook 2013 and the guide below will finally solve the error.
Steps to Fix IMAP Server Error: cannot remove system folder
1. Back up your Outook contacts. Follow this guide from Office 365 : https://kb.wisc.edu/office365/page.php?id=38438
2. Close your outlook after back up is done
3. Search this path in your Windows:
4. In the address bar of windows explorer and rename your outlook folder. Restart Outlook and let it rebuild the data file.
|Just rename the Outlook folder to anything|
5. Your done! Your Outook emails will starting syncing normally.