Microsoft brings Windows and Agent 365 together for on-device agent security

Microsoft says it is bringing Windows and Agent 365 together so agents can run within secure boundaries on the device, using a component it calls MXC. In a post on X, Satya Nadella says more than 50 million agents now run in Agent 365, up 30% quarter over quarter.

He names OpenAI Codex, Anthropic Claude Code and Meta Muse as adopters of the approach.

Nadella says Microsoft's Perception approach enforces identity, permissions, monitoring and containment outside the model itself. Microsoft also says it is encouraged by feedback from preview customers, but the report does not give details of that feedback.