Ovftool

 An excelent tool to export virtual machines. You can indicate the server with the credencials and the destiny of the virtual machine. For example:

ovftool.exe --X:logLevel=trivia  --datastore=Datastore vi://root:PASSWORDOFROOT@172.18.18.18/VMTOEXPORT  E:\VMTOEXPORT.ovf

ovftool vi://172.18.18.18/VMTOEXPORT e:\VMTOEXPORT.ovf