Microsoft enables Anthropic Claude by default UK Copilot tenants

Microsoft is enabling access to Anthropic's Claude models by default for UK Copilot tenants starting December 9, 2026. Administrators who do not opt out by the deadline will have Claude access enabled automatically. Because UK tenants are not covered by the EU Data Boundary and Anthropic processes data in the US, administrators must review whether this aligns with their compliance requirements. Open article →