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Microsoft 365 outage hits Claude's Outlook and workplace integrations
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Fusion42 · 13 November 2026 · Fusion42 review
Anthropic reported that a Microsoft 365 outage disrupted Claude's Outlook and workplace integrations, causing failures in email, calendar, and search tools used by businesses. Anthropic resolved a separate sign-in issue for Claude on November 13, but the Microsoft 365 connector disruptions continued as Microsoft worked through infrastructure recovery.
This Wire brief sits within Fusion42's coverage of Enterprise Software.
◆ ◆ The Wire takeaway
A foundational cloud outage disrupted key integrations for Claude users, signalling a vulnerability in your dependency on Microsoft 365 connectors for email and calendar tools. Reassess your reliance on single-provider integrations before similar outages block your customer workflows.
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1 source · 13 Nov 2026
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