Microsoft is investigating an outage that left thousands of users around the world unable to access the site’s services, including Teams and Outlook.
The company did not say how many people were affected, but Downdetector.com, which tracks outages, recorded thousands of people reporting issues with Teams, Outlook, Microsoft 365 and XBox Live.
It showed that UK email platform Outlook reported 4,992 incidents at 8am today, while Teams reported 2,173.
Users in Manchester, London, Birmingham, Norwich, Oxford, Brighton and Cardiff reported problems.
The site also reported more than 3,900 issues with Microsoft Teams in India and more than 900 issues in Japan.
Reports of outages also increased in other countries, including Australia and the United Arab Emirates.
During the outage, most users were unable to exchange messages, join calls, or use any functionality of the Teams app — forcing office workers to return to face-to-face meetings and communicate in other ways.
Microsoft Tweeted: “We are investigating an issue affecting several Microsoft 365 services. More information can be found in the Admin Center under MO502273.
“We have identified a potential network issue and are reviewing telemetry data to determine next troubleshooting steps.”
It later added: “We have isolated the issues to network configuration issues and we are analyzing the best mitigation strategies to address them without causing additional impact.
“We have rolled back network changes that we believe will have an impact. We are monitoring services as the rollback takes effect.”
Microsoft’s cloud computing division, Azure, also tweeted about the outage, saying some users were experiencing issues with the platform.
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Many Microsoft users posted on social media to share updates about the outage, with #MicrosoftTeams becoming a trending hashtag on Twitter.
“Microsoft Teams and Outlook experiencing issues in Ethiopia…are these services down?” one tweeted.
“Microsoft Outlook, Teams services down in Sri Lanka and globally,” wrote another.
More than 280 million people around the world use Microsoft Teams, and it forms an important part of the daily operations of businesses and schools, using the service to make calls, schedule meetings, and organize their workflow.
Microsoft Exchange Online, SharePoint Online and OneDrive for Business were also affected, according to the company’s status page.
The outage comes as Microsoft – which has more than 220,000 employees, including 6,000 in the UK – announced plans last week to make 10,000 layoffs in its global operations.
In a note to staff, Chief Executive Satya Nadella said the layoffs affected less than 5% of the workforce, amid growing concerns that the U.S. and other major growth markets are headed for recession , leading to a decline in investment.