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Microsoft 365 Copilot Cowork Explained with Bas Brekelmans, Software Engineer at Microsoft

Microsoft Teams Insider

Microsoft Teams Insider
Microsoft 365 Copilot Cowork Explained with Bas Brekelmans, Software Engineer at Microsoft
Apr 28, 2026
Tom Arbuthnot

Bas Brekelmans, Software Engineer at Microsoft, focused on Microsoft 365 Copilot Cowork, explains its architecture and use cases.

• How Copilot Cowork runs entirely in the Cloud, unlike local machine-based alternatives, enabling enterprise-grade security, audit and compliance

• The multi-model approach using Anthropic's Sonnet and Opus, with the flexibility to switch to the best available model

• Built-in and personal skills for calendar management, document generation and automated workflows

• Extensibility through MCP servers, enabling integration with third-party and line-of-business applications

• Scheduled tasks and autonomous email handling that save hours of manual work each day

• Enterprise compliance features including Purview integration, eDiscovery support and rich audit logs

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