How to enable SMT (Secure Multi Tenancy) commands on Data domain

Hello ,

I am trying to create tenant units on one of the recently upgraded DD OS on 5.7 Version using the below ,

smt tenant-unit create "test"

i get the following error ,

**** Failed to create tenant-unit: SMT is not enabled.

Can anyone let me know the steps on how to activate/enable SMT so that i can execute the commands successfully ?

Best Regards

Karthik