What Caused The Massive Microsoft Teams, Office 365 Outage Yesterday? Here’s What We Know By sleonSeptember 29, 2020September 29, 2020news Microsoft online applications, including Teams and Office 365, went down across the U.S. for hours yesterdayâso what happened? Read More » SOURCE: Forbes Related posts: What Caused The Massive Microsoft Teams, Office 365 Outage Yesterday? Here’s What We Know Microsoft Azure, Office 365 users hit by multi-factor authentication issue Microsoft Teams communication platform suffered a temporary outage due to an expired SSL certificate Microsoft Teams heading for consumers, Office 365 plans rebranded as ‘Microsoft 365’