Backup Exec 2012 confusion about ESXi backup jobs

Hello,

i am new to BE2012 and so far, lets say, i am ok with it. There is just one thing that confuses me. I added our ESXi-Host. After the first job (job was successful) BE2012 created automatically two more servers in the server list. These servers are the 2 ESXi-Guests. My question is: The servers were created without backup jobs. Jobs were just created for the ESXi-Host. Is it necessary to create separate jobs for these 2 guests?

In my list it looks like this:

Thanks for your help!

Daniel