Microsoft builds fast and explains slowly. Frontier closes the gap — one feature, one issue, everything a CTO, admin or adoption lead needs to make a real decision. No product announcements dressed up as insight. No "what's new" listicles. Just the architecture, the controls, the data flows, and the questions you should be asking.
All issues
Claude is now inside Microsoft 365 Copilot as a subprocessor — not a SaaS add-on. This issue maps the co-processing architecture, the EU Data Boundary exclusion, the Copilot Cowork integration, and the admin controls your team needs to know about.
Why Frontier exists
Microsoft's Frontier programme is a preview cohort for the most advanced Copilot capabilities — agentic execution, third-party model integration, deep enterprise AI. Features ship fast. Documentation lags. Marketing leads. This zine series exists to translate what's actually happening at the infrastructure and policy level into something a senior practitioner can act on.