Samab AD intergration question

I’m new to nextcloud, but not owncloud.
I’m new to SambaAD, but recently managed to install and configure a fully working sambaAD system. I now have a few win7 machines, all running nicely, authenticating users OK, pushing out group policies etc.
Previously I used sambaNT and owncloud using ownclouds external shares to mount user drives. Worked great.

I now what to do the same with SambaAD and nextcloud.
The documentation says “Seamless connectivity to Active Directory, with no extra configuration required” if I used the LDAP auth app.
My questions are simple, can I do this without installing LDAP on my sambaAD system? (I know very little about LDAP)
If yes, is there an example of the LDAP/ AD integration setting for AD.

Nextcloud version (eg, 10.0.2):11.0.2
Operating system and version (eg, Ubuntu 16.04):Debain 8.7
Samba 4.2.14
Apache or nginx version (eg, Apache 2.4.25): 2.4.10
PHP version (eg, 5.6):5.6.30