Thanks @MattWho  Probably as a result of a nifikop-operator based, LDAP-Authenticated, Clustered Nifi setup, I had to give permissions to both the DN you mentioned and my nifi user (as visible on the top right corner of my nifi UI). Effective Permissions: - Can Proxy User Requests and Can Manage Buckets to both the Users - Read, Write and Delete (if required) access to my buckets Now I'm able to list and interact with my buckets from my nifi UI! ... View more

@MattWho Apologies for the delay here. I could finally try using certificates with the EKU Extensions and I do not see a similar authentication issue anymore.  Thank you for the kind assistance!  ... View more