UPDATE: Oct 7, 2020, 3:40 p.m. Microsoft reports that further investigation has confirmed that a recent update to network infrastructure resulted in impact to Microsoft 365 services. All services are either healthy or in the process of recovering. See status
UPDATE: Oct 7, 2020, 2:24 p.m. Central:It appears as if O365 services are back. We are continuing to monitor the situation.
Oct 7, 2020, 1:50 p.m. Central: Microsoft has reported that there is an authentication issue that impacts all O365 services including Outlook, Webmail (OWA), Office for the Web, Teams, etc. Microsoft is currently investigating.