If a Project includes Service Request input connectors or service-enabled Messages and you deploy the Project to a StreamServer application, the StreamServer application automatically exposes services. The services are used for creating, previewing, and releasing documents and are assigned the same version number as the deployed Project.
By increasing the Project version number and deploying the new version to a separate StreamServer application, you can run an updated Project version in parallel with a previous Project version. For example, in a Correspondence Reviewer scenario, already paused documents in the Message storage are previewed and released using the previous Project version, while new documents are created using the updated Project version.
Limitation – Running several services of different versions in parallel in the same application domain is not supported for StreamStudio Composer.