Inbox

The Inbox was used to enable users to quickly upload items into E-WorkBook either “Print to E-WorkBook” via Printing from an application or “Send to E-WorkBook” by right clicking on a file in the Windows Explorer selecting Send to -> E-WorkBook (much like you do for Send to -> Compressed (zipped) Folder). Send to is automatically installed with the Desktop Client, Print to is a separate installation.

You may be able to hide this node on the navigator by removing the Entity Role Permission: View_User_Inbox

The Inbox itself is a fixed Entity type of the E-WorkBook application.