Users in South America may have been unable to use multiple Microsoft 365 services

A post-incident report has been published.

A post-incident report has been published.

Title: Users in South America may have been unable to use multiple Microsoft 365 services User impact: Users in South America may have been unable to access or experience degraded functionality with multiple services. More info: Impacted services included, but were not limited to: - Microsoft Teams - Outlook - Office Online Apps Final status: We've confirmed that the issue is resolved after an extended period of monitoring. Scope of impact: The majority of reports were from users in Colombia. Start time: Wednesday, August 19, 2026, at 2:15 PM UTC End time: Wednesday, August 19, 2026, at 2:39 PM UTC Root cause: A fiber event in the Colombia region shifted traffic onto a alternate network path, which became congested. This resulted in intermittent packet loss, traffic drops, slower connectivity, and/or higher latency. More details are provided within the Post-Incident Report. Next steps: - For a more comprehensive list of next steps and actions, please refer to the Post Incident Report document. We'll provide a preliminary Post-Incident Report within two business days and a final Post-Incident Report within five business days.

Title: Users in South America may be unable to use multiple Microsoft 365 services User impact: Users in South America may be unable to access or experience degraded functionality with multiple Microsoft 365 services More info: Impacted services include, but are not limited to: - Microsoft Teams - Outlook - Office Online Apps Current status: We've rerouted traffic through alternate network paths and telemetry shows the service had recovered by 2:50 PM UTC. We're monitoring to validate full recovery. Scope of impact: The majority of reports are from users in Colombia. We're still assessing the scope of the issue and will update this section as we know more information. Start time: Wednesday, August 19, 2026, at 2:14 PM UTC Next update by: Wednesday, August 19, 2026, at 4:30 PM UTC

Telemetry is showing improvement as our mitigation actions progress. This is in line with a reduction in user reports of impact. This quick update is designed to give the latest information on this issue. Next update by: Wednesday, August 19, 2026, at 4:30 PM UTC

Title: Users in South America may be unable to use multiple Microsoft 365 services User impact: Users in South America may be unable to access or experience degraded functionality with multiple Microsoft 365 services More info: Impacted services include, but are not limited to: - Microsoft Teams - Outlook - Office Online Apps Current status: We've identified an issue with network paths in the South America region. We're currently rerouting traffic to alternate network paths to remediate impact. Scope of impact: The majority of reports are from users in Colombia. We're still assessing the scope of the issue and will update this section as we know more information. Next update by: Wednesday, August 19, 2026, at 4:30 PM UTC

Title: Users in South America may be unable to use multiple Microsoft 365 services User impact: Users in South America may be unable to access or experience degraded functionality with multiple Microsoft 365 services More info: Impacted services include, but are not limited to: - Microsoft Teams - Outlook - Office Online Apps Current status: We are reviewing service telemetry and available information to determine if there is an issue happening and we'll update this message shortly with our latest findings. This communication serves as a preliminary notification about a potential issue affecting your service. We'll provide an update in 30 minutes. Scope of impact: The majority of reports are from users in Colombia. We're still assessing the scope of the issue and will update this section as we know more information.