2 publishers · first seen Tue, 10 Nov 2026 11:30 UTC · updated Thu, 12 Nov 2026 13:30 UTC
Microsoft will enable Anthropic's Claude models by default for UK Copilot customers from December 9, according to The Register. Administrators can disable the setting, but leaving it untouched means opting in. Anthropic processes data in the US, and Microsoft's documentation states that UK tenants are not in scope for the EU Data Boundary. Microsoft is retiring the setting that limited Claude to Microsoft 365 apps. The change covers Copilot, Researcher, Copilot Studio, Power Platform, and Copilot in Microsoft 365 apps. Some advanced Anthropic models, such as Claude Fable 5 and Claude Mythos 5, stay off by default everywhere.
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