Microsoft Blames Massive Microsoft 365 Outage on Automated Maintenance Bug
ID: f6e998c1-4e28-508f-8305-887d1c0876b1
STIX ID: report--f6e998c1-4e28-508f-8305-887d1c0876b1
Feed Name: CosmicBytez Labs
Microsoft attributed the July 24, 2026 global Azure and Microsoft 365 outage to a bug in its automated network maintenance system that removed IP routes from unintended devices, causing cascading network failures and widespread service disruption (Exchange Online, Teams, SharePoint, OneDrive, Azure Portal, Entra ID, Dynamics 365, Power Platform). Microsoft performed manual route restoration, published a post-incident review within 24 hours, and committed to additional validation gates and resilience recommendations for customers.
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