Windows 10 ver 1909

A few days ago Outlook.live.com ceased receiving and sending emails . Outlook 365 continues to do so. Windows 10 People App continues to sync with People on Outlook.Live. All emails that existed in Live have disappeared. I have not deliberately made any changes of any sort in Live. All emails in Cox Webmail appear intact.

I've no idea how to getLive working again and will certainly appreciate any help?