Hi Chris,
Thank you for contacting NetApp community and regarding your query MYASUP do have the storage efficiency option when you click on the particular client you can see the options to choose from the left side panel.
If you want to manually check the efficiency for a particular controller or your customer's controller you can launch STORAGE EFFICIENCY OPTION under RESOURCES TAB ( Supports only 8.3.2+ AFF system or any 9.1+ ONTAP system ).
Thanks,
Nayab