Here we go for the vDR limitation
Maximum 100 VMs backed up per appliance
Maximum 2 de-duplication stores per appliance
No more than one appliance per vCenter Server supported
Cannot reside in vApp
Multiple appliances are independent and do not interact
Storage
Disk only – no tape/media integration
Maximum of 1TB per de-duplication store
Backups
Maximum 8 concurrent backup and 8 concurrent restore jobs
One backup per VM allowed every 24 hours
Appliance vCPU usage must be under 80%