Microsoft confirmed an incident causing search failures across Microsoft 365 apps including Outlook on the web, Outlook desktop, SharePoint Online, and OneDrive. The company traced the root cause to a recent deployment that introduced a resource utilization inefficiency, and says it has deployed a fix to restore service. This follows similar search-related incidents last year and a separate major Azure/Microsoft 365 outage in July caused by a network maintenance bug, as well as an eight-hour GitHub outage resolved earlier this week.
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Why is search not working in Outlook, SharePoint Online, or OneDrive right now?
Microsoft identified the cause as a recent deployment that introduced a resource utilization inefficiency, degrading search functionality across SharePoint Online, OneDrive, Outlook on the web, and Outlook desktop for some users served through the affected infrastructure. Microsoft has developed and deployed a fix aimed at reducing resource pressure and restoring service, tracked as incident MO1456424 in the Microsoft 365 Admin Center. Track Microsoft 365 service incidents like this one as they unfold on daily.dev.