The approach mentioned by Connections Academy Developer is correct, however the same can be achieved without adding the service file, Telerik.Sitefinity.MigrationContracts.dll and the modification to web.config if you are using the automatic migration from Sitefinity 4.4 project manager because it adds all necessary files and modifies the web.config autmatically.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items