Microsoft 365 Search Outage Disrupts SharePoint, OneDrive, and Outlook Users Worldwide
Brief
Microsoft is actively managing a service disruption that has left a subset of enterprise users unable to search for content across SharePoint Online, OneDrive, Outlook on the web, and Outlook desktop.
The incident, tracked in administrative portals under reference MO1456424 , was confirmed after users reported unresponsive and failing search queries beginning Monday, August 17, 2026.
As technical teams work to stabilize backend systems, the disruption continues to affect organizations that rely on centralized cloud search indexes.
Microsoft 365 Search Outage Disrupts Global Users
According to Microsoft’s service advisory, the issue is not the result of a cyberattack or malicious activity, but rather stems from an internal software deployment.