How to clone TFS before TSF 2018 is explained in posts, Backing Up and Restoring Databases, Prepare Restored Databases and Configuring the AT. Out of these steps Backing Up and Restoring Databases is valid for TFS 2018. But you do not have to perform the Prepare Restored Databases as it can be done while configuring the Application Tier of the cloned TFS instance. Let’s look at valid steps for cloning TFS 2018.