Microsoft Investigates New Exchange Online Disruption
Microsoft has launched an investigation into a disruption affecting its Exchange Online service. The incident, logged as EX1464935 in the Microsoft 365 admin center, began at 9:23 PM IST on August 31, 2026.
The company confirmed that engineers were investigating user reports of Exchange Online issues at 9:25 PM IST, but a root cause or scope of the disruption has not yet been identified. As of the latest update, the status remains listed as 'Investigating.'
Exchange Online is currently the only affected service named in the advisory, although early-stage incidents have sometimes widened to include related Microsoft 365 workloads such as Outlook and Teams.
This is not the first time Exchange Online has experienced issues recently. In June, a separate mail-flow pipeline issue caused widespread delivery delays across North America, Europe, and Asia-Pacific.