IAM in Service Catalog
Click 'Write Configuration'. If a 'Confirm: Overwrite configuration slot 1' box comes up, click Yes
This will overwrite your existing configuration. See the notes in this document for details and workarounds.
A box will prompt for where to save the log file. Save this file to a temporary location and note the name of the .csv file for later reference.
This file contains the secret key that will need to be provisioned into Duo. Once provisioned, this file must be either saved in a safe place if this secret is to be used elsewhere or, if not, deleted immediately.