Microsoft confirmed an outage affecting Outlook and other Microsoft 365 services in South America on May 13, 2026. The company acknowledged the disruption and stated that it is investigating the root cause. Engineers are reviewing telemetry and service health signals to determine the next steps for remediation.
The official Microsoft 365 Service Health Status website did not register the issue.
The outage specifically impacts users in South America. Affected services include the Office.com portal and online mailbox functionality via Exchange Online. Microsoft directed administrators to the Microsoft 365 Admin Center for updates under issue ID MO1309330.
A discrepancy exists between social media reports and official status pages. The official Microsoft 365 Service Health Status website did not register the issue at the time of reporting. This lack of official registration contrasts with the confirmation provided by the Microsoft 365 Status account on social media.
Microsoft has not confirmed a specific launch window for a full resolution. The company continues to monitor the situation and provide updates through the admin center.
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