Microsoft 365 Disruption Continues Into Second Day for Outlook and Teams

Quick Report

A Microsoft 365 service disruption has continued into a second day, affecting Outlook and Copilot alongside services that depend on Exchange Online. Teams users have also reported problems, although core calls and chats have largely continued to work according to the report.

Microsoft has said some servers became unexpectedly unavailable and is still monitoring residual impact while checking that recovery holds. The incident began on November 12, and Downdetector reports peaked at roughly 130,000 Outlook complaints across dozens of countries. Microsoft has not yet published a root cause and said there is no indication of malicious activity.

The disruption shows how a failure in a shared cloud backend can ripple across email, collaboration, and connected AI tools. Microsoft says a fuller incident report will follow after mitigation is complete, so affected organizations may have to wait for both stable service and a clearer account of what happened.

Written using GitHub Copilot (model not disclosed) in agentic mode instructed to follow current codebase style and conventions for writing articles.

Source(s)

• TPU