Currently, there is no supported method to gradually roll out Office Add-in manifest changes to a small percentage of users. A manifest regression affects an entire tenant instantly, and manual rollback is a slow process. The request is for native staged or canary rollout capabilities for add-in manifests, similar to what Microsoft provides for other products. This feature gap impacts add-in deployment and management, particularly for Outlook add-ins using event-based activation.A real-world scenario involves a security add-in deployed to thousands of users, where any manifest change is applied tenant-wide simultaneously. There's no way to pilot a new manifest version, monitor its performance, and automatically revert if issues arise. This results in a large blast radius for failures, and rollbacks are cumbersome and time-consuming. Microsoft's own past issues with event-based activation highlight the need for contained rollouts.Specific missing capabilities include percentage-based or ring-based rollouts, telemetry-gated automatic promotion, and one-click halt and rollback functionality. Manual phased assignments lack automation and still require re-consent for event/permission changes. Running parallel add-in registrations creates duplicate UI and undesirable side effects for event-based add-ins. Web-layer feature flags are insufficient for manifest-level changes.The requested capability is native staged rollout for add-in manifests within Centralized Deployment. This would allow defining rings or percentages for new manifest versions, with automated promotion based on health signals. It would also include a one-click halt and automatic rollback to the previous version. Programmatic support through PowerShell or Microsoft Graph would enable integration with CI/CD pipelines.Microsoft already implements staged/canary rollout patterns for Microsoft 365 Copilot connectors, Microsoft Store apps, Microsoft Entra ID, and the OneDrive sync app. Office Add-ins represent a notable gap in this regard. Implementing staged rollout would benefit Independent Software Vendors and enterprise administrators by reducing tenant-wide outages and enabling safer CI/CD for add-ins. The request is directed at Outlook add-ins on Windows, web, and Mac.