Product

Microsoft 365 Copilot

2 mentions in 7 days · 2 in 30 days · 3 total · first seen Aug 16, 2026 · last 4d ago

Timeline3 articles

Update your firewall rules: Teams and Copilot are changing address

Microsoft is redirecting Microsoft 365 and Teams web users to new *.cloud.microsoft domains, requiring firewall and proxy rule updates by early October.

Starting September 2026, Microsoft is redirecting M365 web users to copilot.cloud.microsoft and Teams web users to teams.cloud.microsoft, announced via MessageCenter posts MC1465764 and MC1462915. All redirects should complete by early October 2026, with limited Teams exceptions possible until December 31, 2026. Microsoft advises reviewing client, proxy, firewall, and secure web gateway configurations, and suggests using TenantRestrictions to control personal Microsoft account access instead of blocking the new Copilot address.

CSO OnlineSep 11, 17:00 UTC · 4d agoAdvisory

Microsoft Investigating Microsoft 365 Copilot Access Issues Under Incident CP1470554

Microsoft is investigating a Microsoft 365 Copilot access disruption tracked as incident CP1470554, with no root cause or recovery timeline published.

Microsoft is investigating reports that users cannot open Microsoft 365 Copilot or encounter errors when interacting with it, tracked under Service Health incident CP1470554 in the Microsoft 365 admin center. The company has not disclosed a root cause, affected regions, or estimated recovery time. It follows several distinct Copilot availability failures between late August and September 10, including an authentication-configuration outage and a Copilot Chat configuration fault. Microsoft says the issue is not a breach or cyberattack and directs tenant admins to the Service Health Dashboard.

Cyber Security NewsSep 11, 07:34 UTC · 5d agoAI industry1

Confusedpilot Attack Targets Ai

ConfusedPilot attack exploits Microsoft 365 Copilot's retrieval pipeline to expose confidential enterprise data in AI responses.

ConfusedPilot targets Microsoft 365 Copilot's retrieval-augmented generation pipeline, potentially causing the assistant to surface confidential enterprise content in generated responses. Researchers disclosed the technique as a Copilot data confidentiality flaw affecting search and caching behavior. It highlights the emerging attack surface in enterprise AI assistants that access corporate data stores.

Infosecurity MagazineAug 16, 00:00 UTC · Aug 16, 2026AI safety & security in the wild

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vendor Microsoft 3 organization Microsoft 2 ai model ConfusedPilot 1 ai model Microsoft 365 Copilot 1 product Microsoft Teams 1

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