Microsoft is investigating a widespread outage affecting several Business and Enterprise Microsoft 365 services, including Outlook. Here are the details.
Microsoft says the issue is partly resolved
Based on information available on Microsoft’s Status Page (which is seemingly also facing reliability issues), users “may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.”
The incident began around2:00 p.m. ET and was attributed to backend infrastructure issues:
A portion of dependent service infrastructure in the North America region isn’t processing traffic as expected.
In its lastest status update, Microsoft said that the affected infrastructure had been restored, but recovery was still in progress as traffic was redistributed across healthy systems:
While we’ve restored the affected infrastructure to a heathy state, further load balancing is required to mitigate persistent impact. We’ve identified and are implementing additional actions to direct requests and traffic to additional healthy sections of infrastructure to achieve withstanding recovery.
Initially, Microsoft noted that impacted features included, but were not limited to:
Sending and receiving email through Exchange Online, including notification emails from Microsoft Viva Engage.
Collecting message traces.
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