Abstract:
On November 13, Microsoft Executive Vice President Charles Lamanna posted a message on the social platform He said that Microsoft is dealing with related issues and there is currently no indication that the outage was caused by malicious activity or a cyber attack.
This failure occurred on November 12, local time. Exchange Online and Outlook were the first to experience connection abnormalities. Some users were unable to access their mailboxes, send and receive emails, or use calendar functions. Subsequently, services such as Teams, OneDrive, SharePoint and Microsoft 365 Copilot were also affected to varying degrees, and the daily work of enterprises and government agencies was temporarily hampered.
Microsoft stated through its Microsoft 365 Status account that the relevant incident numbers are EX1550543 and MO1550821. Investigations revealed that the process responsible for establishing secure connections in some servers stopped processing requests due to excessive load. Microsoft tried to adjust network configurations, expand virtual machine capacity, and restart abnormal servers, but some of the repair measures failed to take effect as expected.
LaManna said Microsoft will continue to announce progress as more information becomes available. As of the time of its posting, Microsoft has not disclosed the final technical cause of the failure, nor has it given a clear time for full restoration of services.
Related articles:
Microsoft is still repairing Outlook and Copilot systems. Technical glitches have occurred for several hours
Microsoft 365 global outage lasts for several hours: business users may apply for service compensation. Personal accounts are usually not applicable
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