Microsoft is continuing recovery efforts to correct yesterday’s Office 365 outage. Many users are now able to access services, but there are still numerous reports of outages of email and cloud drive access. As of this time there is no stated timeframe for full recovery of all affected services.

Please see the included article for more information.
https://www.techrepublic.com/article/azure-outage-microsoft-working-to-restore-key-services-after-us-regional-outage/