In a few years, the vocabulary has changed since we have moved from outsourcing to managed cloud services boosted by automation. Whatever the approach or the name given, outsourcing to the cloud or to clouds is taking on an unprecedented scale today; large French companies are even migrating their entire IS to a public cloud, even the most critical applications. The locks (sovereignty, governance, reversibility, data security, costs, etc.) are jumping one after the other and the future no longer even seems to be in favor of a hybrid approach but rather towards a multicloud approach. An outsourcing project to the cloud is long and sometimes complex, especially for a company with a heavy application heritage: the requirement is therefore placed on planning, contractualization and the involvement of all.