Hi,
Have you deployed the certificate on your unix client? By default the file could be stored in /var/lib/ocsinventory-agent/http:__<fqdn_or_ip_of_the_server>_ocsinventory; then edit /etc/ocsinventory-agent/ocsinventory-agent.cfg file. Set ca variable as ca=/var/lib/ocsinventory-agent/http:__<fqdn_or_ip_of_the_server>_ocsinventory
Regards
Frank