It may happen that you have indexed documents with a specific extension which is not known by Datafari. If this is the case, the concerned documents will be displayed in the result view without any icon (here Template_Document.dotx):
To correct/avoid this, you will have to add a new icon for your concerned extension in 'DATAFARI_HOME_DIR/tomcat/webapps/Datafari/images/icons'. The file must be a png type and respect the following pattern : [extension_name]-icon-24x24.png
For example, the icon file to add to the icons folder in order to correct the problem showed above would be : dotx-icon-24x24.png
Of course you can make a copy of an existing icon from the icons directory and rename it.
Once the icon is available, it will be automatically used by Datafari.