I am having the same issue, and I also discovered the error message "Found existing non-SAML user with email USERNAME@domain.com". This happened after I had been using Cisco SecureX Sign-On and then decided to turn it off. It removed the Admin accounts that were using SecureX from the Administrator page. I suspect they are still somehow linked, but turning the feature back on does not re-add them to the Adminisstrators page. Any suggestions on how to clean this up? ... View more