Centos 7 ssh login failed using LDAP and sssd [closed]
Quiet old question, probably problem was solved, but I'll reply to help others peoples with same trouble.
I found a solution here :https://www.linuxquestions.org/questions/linux-server-73/sssd-configuration-problem-4175477396/
At few words :
If ldap_access_filter isn't configured and filter is in the ldap_access_order (which is the default when it's not specified) all users are denied access.
So ldap_access_filter should be configured even to allow all users to connect. After doing that, my (similar) problem has gone.
Hope it will help somebody.