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You can migrate an on-premises Azure DevOps Server (TFS) project using TFVC to Azure DevOps Services (cloud) — even without converting to Git. Microsoft supports TFVC in Azure DevOps Services, although Git is recommended for new projects.
- TFVC (Team Foundation Version Control) is fully supported in Azure DevOps Services, so you do not need to convert to Git.
- Your classic apps using TFVC will still work after migration.
- The project, code, history, and workspace mappings will all migrate.
- You must upgrade your on-prem server to Azure DevOps Server 2022 (or at least TFS 2017/2018), and then use the Azure DevOps Migration Tool to move to the cloud.
https://learn.microsoft.com/en-us/azure/devops/migrate/migration-overview?view=azure-devops
https://learn.microsoft.com/en-us/azure/devops/migrate/migration-test-run?view=azure-devops
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