Vmware ESXi 5.5 VM Backup - Deduplication Option

Hello All;

I've BE 2014 and would live to backup my Vmware virtual machines by using deduplication option. Some of VMs are at remote site and some of them are at the same site with BE server.

When I create a backup job for VCenter in order ot backup a VM, job doesn't has a deduplication option for virtual machines. What am I missing?

Regards

Tirelibirefe