How can I fix Windows 10 Mail app?

Q. How can I fix Windows 10 Mail app?
A. Open Mail app

1. Go to Settings
2. Click on Manage accounts
3. Click on your email (not working)
4. Click on Option for syncing your content ( under Change mailbox sync settings)
5. Uncheck Email, Calendar, Contacts
6. Done and close

Restart Windows and sync again Email, Calendar, Contacts