Microsoft 365 down: What happened to Outlook, Teams, Store and Defender today? First outage details emerge
Microsoft 365 is down on Thursday and the company issued a statement as thousands of users faced problems with services.
Microsoft 365 was down for numerous users on Thursday. At the time of writing, over 8,000 users faced issues with Outlook, as per Downdetector. The site that aggregates reports on outages also showed that there were problems with Microsoft Store and Defender. At the time of writing over 900 people faced problems with Microsoft Store while over 300 appeared to face troubles with Defender.

In case of Outlook, a majority of complaints were centered around not receiving messages, as per Downdetector. People complained in the comment section of the page, as troubles continued.
One person wrote “cannot logo in to email.” Another said they were facing the following problem.
“451+4.3.2+Temporary+server+error.+Please+try+again+later+ATTR2+. Started about 1:05pm CST,” they wrote. Meanwhile Downdetector noted that most users began to report issues from 2:21 PM EST.
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Many people took their complains to X as well.
“There is an unreported Microsoft Office 365/Exchange Online issue right now.. Emails are going out slowly, Nothing incoming. Down Detector showing massive spike in issues the last hour. No word from Microsoft yet,” one person wrote. Another added, “Looks like Microsoft365 just started experiencing issues w/ email delivery & other services. Emails getting deferred on connection & delayed.”
Yet another person said, “I have issues with my Microsoft accounts and outlook right now, also my web apps on my desktop, is this the same for you guys?”.
Microsoft provides update on outage
The company issued a statement as numerous people complained about the problems.
“We're investigating a potential issue impacting multiple Microsoft 365 services, including Outlook, Microsoft Defender and Microsoft Purview. Further information can be found in the admin center under MO1221364,” they said on X.
They added, “We've identified a portion of service infrastructure in North America that is not processing traffic as expected. We're working to restore the infrastructure to a healthy state to achieve recovery.”
On January 21 Microsoft faced troubles as well with complains coming in about Outlook and Teams. At the time, they had said that a possible third-party networking issue was impacting services.
“Our investigation indicates a possible third-party networking issue may be affecting access to Microsoft 365 services, including Teams and Outlook for some users,” they had said. After a quick fix, Microsoft had added, “Access issues for Microsoft 365 services, including Teams and Outlook, have been resolved. We’ve determined that the Microsoft service environment remained healthy, and that the incident was related to a third-party network issue.”
ABOUT THE AUTHORShuvrajit Das BiswasShuvrajit has over seven years of experience covering US, India, and world news. An English Literature postgraduate from Jadavpur University, Shuvrajit started off covering entertainment, gaming and all things pop culture. There were brief periods away from the media industry, with short stints in content marketing, ed-tech and academic editing. However, the newsroom beckoned and over the last few jobs, Shuvrajit has exceedingly focused on team functioning as well, including tracking news and assigning tasks, working on everyday breaking news, framing detailed coverage plans, and creating immersive and data-driven stories. In his time as a digital journalist, he has covered a Lok Sabha election, multiple state elections, Union Budgets and award ceremonies. He has also helped in planning content for company event panels in the past. For work, Shuvrajit enjoys dabbling with data visualization, editing tools, and AI chatbots and attempts to incorporate AI workflows in everyday tasks. He is deeply interested in geopolitics, sports, films and music. Prompting is a new fascination for Shuvrajit now. Apart from that, he can be found doom-scrolling, sharing memes, or cheering on his favorite football team.Read More

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