Tech giant Microsoft has said it was investigating an outage where users were unable to access Microsoft Teams or leverage any features on the app.

Microsoft’s Teams app was down on Thursday for more than 3,000 users, according to outage tracking website Downdetector.com.

Though the MS Teams was back up for most users, the company said, after an hours-long outage that disrupted the chat application for tens of thousands of customers globally.

The company cited a disruption in a recent software update that “contained a broken connection to an internal storage service”.

“We’re addressing any residual impact related to this event. Additionally, we are monitoring for any signs of failure until we’re confident that all functions of the service are fully recovered,” the company said on its website, Reuters reported.

MS Teams, used by more than 270 million people globally, forms an integral part of daily operations for businesses and schools, which use the service to make calls, schedule meetings, and organize their workflow.