Microsoft is struggling to fix a major global outage of its service that is reportedly affecting tens of thousands of users.
Services including Teams, Outlook and Microsoft’s artificial intelligence software Copilot have been affected by “connectivity problems”.
The company said in a series of updates on X that it was seeing “positive results” with its efforts to restore services and that it was rushing to fix the problem.
Reports of issues with Outlook peaked globally at nearly 140,000 around 18:00 GMT on Thursday, according to monitoring website Downdetector. The BBC understands there is no indication the outage was caused by a cyber-attack.
The disruption affects programs that are part of Microsoft 365 – a popular online service among businesses that allows them to use workplace tools like Outlook, Teams and OneDrive.
For international organisations, this platform is essential for connecting and collaborating with colleagues around the world.
Among the issues, users may be unable to view certain files or details on their calendar apps, Microsoft said.
Its AI platform, Copilot, may also be unable to work properly.
Messaging and online meetings were largely functional, the firm added.
Microsoft said on X that the outage was caused by a number of servers “being unexpectedly unavailable”, straining its remaining systems.
“We appreciate our customers’ patience while we work to restore services as soon as possible,” said a Microsoft spokesperson.
The company later warned that some services that had been restored “can become unresponsive again”, adding that customers “in any region” could be affected.
Users around the world including the US, Japan and Singapore have reported facing disruptions.