Working with VM replication sets (Windows) : Microsoft Hyper-V checkpoint replication sets : Creating a Microsoft Hyper-V checkpoint replication set : Specifying the items to replicate
 
Specifying the items to replicate
1. In the Select directories/files for replication page, select the source virtual machine in the Shares & Directories List, and then click Add.
The source virtual machine that you have just added is displayed in the Replicated Items Selected section. You can add multiple virtual machines.
F1 Help: "Select Items for Backup Set"
2. Click Next