Microsoft has acknowledged a significant bug introduced by its March 2026 cumulative update that is preventing users from signing into Microsoft Teams Free, OneDrive, and several other Microsoft applications on Windows 11 devices. The issue, tied to the KB5079473 update released on March 10, 2026, has left affected users locked out of their accounts despite […] The post Windows 11 March Update Breaks Microsoft Teams and OneDrive Sign-Ins appeared first on Cyber Security News.