Plone 5.1.6 pas.plugins.ldap 1.8.0 do not work together on Windows

[Abrahyo]

On a Windows 2016 server, I installed plone 5.1.5 and pas.plugins.ldap 1.6.2 via buildout. Everything settled down well. Indeed when I connect to the ZMI of plone 5.1.5 then acl_users,
I have LDAP-Plugin which allowed me to configure it.
Everything works well with Active Diretory.
However on the same server, I installed plone 5.1.6 and via buildout
pas.plugins.ldap 1.8.0.
But when I connect to the ZMI, there is no LDAP-Plugin.
So no way to communicate with Active Directory.
My question has anyone tried? If so, the problem is with plone 5.1.6 or pas.plugins.ldap 1.8.0.
Thank you in advance for your help