Thank you for the answer
It’s owncloud/server:10.4.1
In /etc/openldap/ldap.conf you must:
Either set TLS_CACERT /etc/openldap/cacerts/YOURCERT.pfx
Or set TLS_CACERTDIR /etc/openldap/cacerts/
The first one constrains you to a specific cert.
The latter tries all of them in the directory.
I would recommend to add your certificate to the internal ownCloud certificate storage like so:
Using the occ Command
I will try this method and describe the results, thanks once again)