Install fusiondirectory-plugin-mail-schema by entering the following commands in the terminal:
sudo apt update sudo apt install fusiondirectory-plugin-mail-schema
Description:
LDAP schema for FusionDirectory mail plugin
This package includes the LDAP schema needed by the FusionDirectory mail plugin. . FusionDirectory is a combination of system-administrator and end-user web interface, designed to handle LDAP based network infrastructures.
Homepage: http://www.fusiondirectory.org/
Version: 1.0.19-1
Section: universe/web