This document discusses Ciena's Multi-Domain Service Orchestration (MDSO) platform, which provides orchestration across multiple domains including WAN, SD-WAN, NFV, cloud, and more. The MDSO is infrastructure-agnostic and uses open APIs to reduce vendor lock-in while automating service delivery. It allows for modular and extensible onboarding of virtual and physical network functions from multiple vendors to provide end-to-end control and programmability. Real-world use cases demonstrate how the MDSO has helped customers quickly provision new services and reduce costs through automation.