The Microsoft 365 logo is displayed on a smartphone screen. A system-wide failure affected Excel, Teams, and Outlook, frustrating tens of thousands of workers. This occurred two months after the CrowdStrike situation, resulting from a faulty software update. The company announced the investigation of the issue via X (previously known as Twitter), directing users to look for MO888473 in the admin center for more details and updates.

A change in a third-party ISP’s managed environment caused an impact, resulting in over 20,000 users experiencing outages on September 12. Reports of the outage peaked around 8 a.m. ET, but incidents decreased as the morning progressed. Throughout the morning, Microsoft provided updates via X, explaining that the outage was caused by a change within a third-party ISP’s managed environment.

Microsoft Outlook experienced the most outages, with 75 percent of reports being about the app and 17 percent involving server connections. Many users also complained about Teams being down. Microsoft later confirmed that the issue had been resolved, and connections were operating normally. At about 11 a.m.

ET, the company tweeted that they had monitored their systems and confirmed that the impact had been remediated. Amid the outage, Microsoft also faced setbacks in employment, including plans to lay off 3 percent of its global team, specifically the *Call of Duty: Warzone Mobile* video game staff, according to Variety.