Microsoft is working to resolve a widespread Microsoft 365 disruption that has entered its second day, with search and other functions across Exchange Online, SharePoint, OneDrive, Teams and Microsoft 365 Copilot still affected despite the recovery of much of the Exchange Online mail flow.
The incident, according to a report published by the University of Pennsylvania’s IT department based on data from Microsoft’s admin console, began with Microsoft investigating an increase in user reports of Exchange Online problems at 11:55 a.m. UTC on August 31.
By 12:33 p.m. UTC, Microsoft said it had isolated a common failure pattern across affected Exchange Online requests associated with authentication and protocol connectivity, and was working on potential remediation options.
About an hour later, it said that a potential corrective action for the affected infrastructure had been identified and the nature of its deployment was being evaluated.
However, another hour later, it reported that the problem had extended beyond Exchange Online to other Microsoft 365 services, but stopped short of calling it a complete or total outage.
