Verified in 5.8.2.3, both with MIQLDAP AD and db users. Created users without ssui perms, login failed as expected. Then tried to log in with user with valid perms and login was successful.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2017:3005