In Redmond, Washington, Microsoft announced that by early Friday morning, they had successfully addressed the technical issues that had impacted tens of thousands of users the previous day.

According to DownDetector, an outage-tracking platform, over 15,000 users encountered problems with Microsoft 365 products at approximately 3 p.m. Eastern time. Additionally, Microsoft Outlook saw reports from 12,000 users, while 500 users reported issues with Microsoft Teams.

Microsoft’s support teams took to social media to confirm they were investigating the cause of the outage. The company attributed the disruption to a malfunction in the service infrastructure.

“We have pinpointed an issue with a segment of our service infrastructure in North America that is not handling traffic as expected,” the company stated. “Efforts are underway to restore the infrastructure to optimal functionality for full recovery. Further details can be accessed on our status page or through MO1221364, if available.”

Nearly two hours after the outage began, investigators said they’ve restored infrastructure to a “healthy state,” but said further load balancing is required to mitigate the outage’s impact.

“We’re directing traffic to alternate infrastructure to achieve recovery,” Microsoft said in a social media post at 4:14 p.m. Eastern. “More information can be found at or under MO1221364 if accessible.”

Microsoft offically announced the outage had been resolved hours later at around 1:30 a.m. Eastern, saying mail flow is stable and access to affected services has been restored.

Microsoft resolved a brief outage on Jan. 21, which investigators said was caused by a third-party networking issue. That outage only lasted just over an hour.

This article will be updated with the latest information as it is released.