Wire · technology
Microsoft 365 Outage: Azure Maintenance Bug Wiped IP Routes, Taking Down Teams for Hours
◆ Sectors
◆ Geography
◆ Source
◆ Verified
Fusion42 · 25 July 2026 · Fusion42 review
Microsoft's automated network maintenance system contained a bug that incorrectly expanded the scope of a routine maintenance request, causing it to remove IP routes from unintended devices and severing a West US Azure datacenter from Microsoft's global network for nearly five hours, knocking out Teams, SharePoint, OneDrive, and 13+ other cloud services across North America.
This Wire brief sits within Fusion42's coverage of Enterprise Software, and 5 sources have reported it between 24 Jul 2026 and 25 Jul 2026.
◆ ◆ The Wire takeaway
If you run SaaS on Azure, your safety check isn't checking what you think it is — it's validating the buggy converter's output, not the engineer's intent. Build your own guard rail before Microsoft fixes theirs, or your outage is someone else's maintenance mistake.
◆ Coverage
5 sources · first reported 24 Jul 2026 · latest 25 Jul 2026
◆ Related on Wire
◆ Topics