CyberSecurity News
Microsoft 365 Outage Disrupts Outlook, Exchange Online and Teams
SecurityWeek
· November 12, 2026AI summary
Microsoft experienced an outage affecting several of its services, including Outlook, Exchange Online, and Teams, due to failed server health checks. The company is currently investigating the cause of the disruption. So far, Microsoft has found no evidence to suggest that a cyberattack was responsible for the outage. The services impacted are all part of the Microsoft 365 suite. An investigation into the cause is ongoing.
This is an AI-generated brief aggregated by HackerFeeds for convenience and grounded in the source’s own summary; the related CVE, threat-group and country data is from HackerFeeds’ own indexes. The original article is the authoritative source — all rights belong to SecurityWeek.

