Microsoft shipped Agent 365 last Friday with something most people skipped past: cross-cloud registry sync with AWS Bedrock and Google Cloud's agent platform. IT teams can now discover, inventory, and lifecycle-manage agents running outside Azure from a single control plane. That one bullet is the whole announcement. The implication is bigger than the launch deck. We've been running agents at Upswing across three clouds for about a year. Pricing in one, IoT telemetry in another, guest-comm in a third. The thing nobody warned us about is that agents proliferate the same way SaaS subscriptions did in the 2010s. One team spins up an agent to summarize support tickets. Another adds one to run nightly reports. Six months later you have forty agents you can't enumerate, half with stale credentials, none with an owner. It's shadow IT, but the shadows write to your database. What Agent 365 is actually shipping is Active Directory for agents.…