Once you complete the steps, the Mail and Calendar apps will reset, deleting the data stored locally on the computer. Under the 'Reset' section, click the Reset button.
Under the 'Apps & features' section, select the Mail and Calendar app. How do I Reset my Calendar in Windows 10? The last resort is to reinstall Mail and Calendar apps inside Windows 10. It would probably resolve the problem but if it doesn’t, then, you should give a try to the next one. You should also make sure that your Windows is up-to date and no updates are pending. What should I do if my Windows 10 calendar is not working? If the error persists, check to see if there's an upgrade of Windows Live Mail available or contact a service representative. There was an error when attempting to connect to the Windows Live Calendar service. Frequently Asked Questions Why is there an error on Windows Live Calendar?