Microsoft 365 Service Degradation Disrupts Users Across South America
Brief
Microsoft is responding to a regional outage that may leave users in South America unable to use multiple Microsoft 365 services. The company is tracking the disruption as issue MO1457636, a service degradation of the Microsoft 365 suite that began at 2:34 p. m. UTC on August 19, 2026 (8:04 p. m. IST).
Microsoft 365 Status posted the advisory publicly, and tenant administrators should see the same incident in the Microsoft 365 admin center Service Health dashboard.
The official impact statement is unusually broad for a midweek cloud event. Microsoft said users in South America may be unable to use multiple services, and it attached the alert to the Microsoft 365 suite rather than a single app such as Exchange Online or Teams.
That wording matters for help desks.