If you are on Microsoft M365 and ExchangeDefender, this outage sucks but you still have the ability to send and receive email as do all of your devices.
Go to https://admin.exchangedefender.com and click on Inbox. You'll see last 2 weeks of your email including email that is being delivered to you in realtime (and will arrive at your Microsoft Outlook when Microsoft fully restores services). In the meantime, you can still email.