Backup Virtual machine Snapshot

Hello

We want to backup our virtuals machines.

So I do some test on 4 VMs.

I found a problem for us.

When the backup is launched, the software created a snapshot on the VM.

At the end of the job the snapshot is still here.

Do you know if it's possible to delete automatically the snapshot after the backup ?

I use HP Data protector 8.10 (cell manager) and 8.00 (media agent).

We use VMWare for virtualisation.

Thank you.