We don’t offer a way to migrate artifacts, build logs, and historical build data from TeamCity to TeamCity Cloud.
Projects and build configurations can be exported from TeamCity to TeamCity Cloud using our project import/export features. Please note that you must be running the latest version of TeamCity. Some functionality (such as build configurations which use third-party plugins) may not be supported because of noted differences and limitations between TeamCity On-Premises and TeamCity Cloud.
Contact us if you have other questions about migrating to TeamCity Cloud.