apt install 'fusiondirectory-plugin-(dovecot|mail|postfix|quota|sogo)' fusiondirectory-schema
fusiondirectory-insert-schema
fusiondirectory-insert-schema -i /etc/ldap/schema/fusiondirectory/dovecot-fd.schema
fusiondirectory-insert-schema -i /etc/ldap/schema/fusiondirectory/mail-fd*
fusiondirectory-insert-schema -i /etc/ldap/schema/fusiondirectory/postfix-fd.schema
fusiondirectory-insert-schema -i /etc/ldap/schema/fusiondirectory/quota*
fusiondirectory-insert-schema -i /etc/ldap/schema/fusiondirectory/sogo-fd-conf.schema /etc/ldap/schema/fusiondirectory/cal*
fusiondirectory-insert-schema -i /etc/ldap/schema/fusiondirectory/systems-fd* /etc/ldap/schema/fusiondirectory/service-fd.schema