I tried a couple of LDAP solutions out there; Windows Server AD, Open LDAP, Samba4 in Debian, TurnKey Solutions LDAP before finally settling on Zentyal. It has a nice to use web GUI and can work in conjunction with AD RSAT tools that I have installed in a throwaway Windows VM for when I need more granular controls the web GUI can't do.
All my Debian VM's and laptops connect to Zentyal AD via SSSD.