US Patent 10048890 Synchronizing catalogs of virtual machine copies

Synchronizing catalogs of virtual machine copies is described. A system determines the number of copies of a virtual machine in a catalog associated with a virtual machine storage management tool. The system determines the number of copies of the virtual machine in a catalog associated with a backup application. The system creates a copy of the virtual machine, which is associated with the backup application, if the number of copies of the virtual machine in the catalog associated with the virtual machine storage management tool is greater than zero and if the number of copies of the virtual machine in the catalog associated with the backup application is zero.