Migrate from TFS to Team Services with the TFS Database Import Service
The Team Foundation Server Database Import Service offers a high-fidelity way to migrate collections from Team Foundation Server to Visual Studio Team Services. This video introduces you to the Team Foundation Server Database Import Service. We break a migration effort into phases, and provide best practices to follow.
Product info: www.visualstudio.com/team-services/migrate-tfs-vsts
Learn more: docs.microsoft.com/en-us/vsts/articles/migration-import