Microsoft’s cloud hit by lightning

Some severe weather brought down much of Microsoft’s Azure cloud in Microsoft’s South Central Azure region in USA.

The issue was caused by a lightning strike to Microsoft’s cooling system in San Antonio which  “resulted in a power voltage increase that impacted cooling systems. Automated datacenter procedures to ensure data and hardware integrity went into effect and critical hardware entered a structured power down process.”

Affected systems included Office 365, Azure Active Directory and Visual Studio Team Services, but the issue now appears largely resolved, with the last status message saying:

Keep an eye on the status of the service at Microsoft here.

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