Ben, to the best of my knowledge, you aren't finding the button because there is none.  If you want to keep the existing users and setups, the  vApp upgrade path is that direction.  This is presented as an option In the "Unisphere for VMAX Installation Guide"  called "Upgrading the Unisphere for VMAX Virtual Appliance using an ISO image"  thank you
I have an existing "Unisphere for VMAX" vApp, but I want to upgrade the version by deploying a newer one from OVF. My existing UniVMAX only does Local Directory for authentication, and my new UniVMAX will do the same. I'm looking around the UniVMAX interface and trying to find a button to export the local user account definitions to a file that I will later import to the new UniVMAX, but I'm not seeing any such button.  Is there an easy way to export local user definitions through the interface? If not, can anyone outline the steps in CLI? Thanks!
How to export user accounts from an old UniVMAX server to a new one