Microsoft’s Outlook email system appeared to be down early Thursday afternoon, with more than 140,000 outage reports as of 1:30 pm on Thursday, according to a website tracker Downdetector.
The company — which has more than 400 million active users — said that a number of servers became unexpectedly unavailable which strained the remaining infrastructure. It’s not clear what impacted the servers, but they were working to get them back online.
The tech giant began investigating reports of people unable to access their emails in the middle of the work day.
“We’re investigating reports of users experiencing issues accessing Exchange Online mailboxes through multiple connection methods in the Americas,” the company said in a statement.
The office message system, Teams, also appeared to be down.
Microsoft’s service page for its suite of products, including Microsoft 360 was buffering for nearly half an hour before telling users that their services may not be working.