Smartphone Android Enrollment Error

We are setting up Advanced Authentication Server for Beta Testing to work with our SSPR Server.

We were working with a consultant but he is not longer available.  The consultant needed to add the the  Adv. Auth. Server certificate a specific way to allow Android Smartphones to work get enrolled.  Then the Certificte expired and we have the original problem with Andorid phones again.

I can enroll Apple iPhones smartphones just fine.  Email OTP work just fine.    I then found this article: https://www.netiq.com/documentation/advanced-authentication-63/smartphone-applications/data/t481aiz1lpqz.html  but that did not work.  Perhaps I did not add create the certifiate .pdf correctly?

Anyone have any experience with this problem?  Not being able to enroll Android Smartphones to AAS; but, iPhones work correctly?