Around 2 p.m., over 15,000 users reported outages across Microsoft 365, Outlook and Teams. In a social media post, Microsoft said it was investigating.

The dilemma for millions of Windows users now is that Microsoft also warns that “while you might choose ultimately to uninstall a security update, you should know the risks associated with the uninstallation.” These include vulnerability to attacks, compromised personal information and potential data loss, Microsoft says.

According to the website the outage started around 2 p.m. and spiked at around 3:15 p.m. with 15,792 people reporting outages. The numbers started to drop, and at 4:30 p.m. showed about 9,800 users still without Microsoft 365.

More than 15,000 Microsoft 365 users weren't able to use basic functions Jan. 22 after the company suffered problems.

Microsoft's January 2026 security update for Windows 11 has triggered some highly disruptive system issues, users report. As a result, Microsoft rushed this weekend to release emergency updates that fix some problems, but not others.