The Logo is a special Function field for displaying an image in the Print output document.
Note: The ArcGIS Server does not support images with transparency (GIF, PNG) so transparent Logos cannot be printed with WebOffice plot extension. For details and workarounds see following Esri knowledge base articles:
•Transparent GIF and PNG inserted images do not display and/or do not export or print as transparent.
•HowTo: Convert original logo artwork or a bitmap logo into EMF for inserting into an ArcMap layout.

LOGO (Community) configuration
Property |
Description |
Field value |
HTTP URL referencing the Logo image file. Note: The value must be an http URL which can be resolved on the GIS Server by the ArcGISSOC user. |
ID of field value |
The ID for this predefined Function field is always community_logo. |
LOGO (Community) configuration