Thanks for the response. I have read over all of the provided links.
Below are additional details:
- Configured external accounts using both Access Key Credentials and IAM role authentication.
- Neither works but I am not clear on what credentials need to be assigned to the IAM role or access key's account.

- Tried to setup a replication schedule for HDFS with each external account as the destination.
- Tried using "root" or root-like account on the underlying linux system(s) and "admin" from the cloudera gui.

- Tried both static and dynamic replication strategy

No errors appear on the dialog and no errors appear in cloudera events or logs.
Is there something else to check?