In an Nintex O365 list workflow, how can I iterate through a document set to find a specific folder?  I have not been able to get the recursive feature to work.

I have a document library Portfolios.

Inside of the document library are documents sets:  

   Portfolio A

   Portfolio B

   Portfolio C

   ...

Inside of each document set is a folder called Snapshot. 

   Portfolio A/Snapshot

   Portfolio B/Snapshot

   Portfolio C/Snapshot

   ...

Within the workflow I need to find the ID of a specific Snapshot folder so that I can set unique permissions.

For example, I need to find the ID of Portfolio A/Snapshot where Portfolio A is the current item.

Thank you for the help.