Microsoft Outlook is hit by a new outage disrupting email access worldwide.

Microsoft confirmed its Outlook email service is currently experiencing an outage. Both business and consumer users cannot access their inboxes.

The issue initially affected the U.S. and the Americas. It later expanded to impact “any region” worldwide.

Infrastructure Load and Server Issues

Microsoft has not specified exactly what has caused the issue but said it was sharing updates within the admin centre.

However, this is currently inaccessible, and Microsoft is updating users via X who are unable to log in.

They said there was some “high load” on some of its infrastructure, and engineers are “balancing connections” between infrastructures globally.

In its most recent update, Microsoft said the issue was due to having “a large number of servers being unexpectedly unavailable.” They have not explained why they went offline but are continuing to investigate.

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Microsoft Apps Affected

The outage is affecting more than just Outlook. Microsoft confirmed that Teams, SharePoint, and Copilot are also not working.

Defender XDR is also causing issues, as are consumer services.

OneDrive cloud storage, Office for the web, and various other Microsoft services are all unavailable.

Last September Outage

Microsoft last had a major outage in September when it suffered a multi-day outage with its Microsoft 365 suite. This includes Outlook, as it is an online productivity suite.

Microsoft said this was due to an issue with a “core authentication configuration.” This meant users were unable to log into their accounts.