If there is a single root folder that everyone would share then you can set this as an option for the workspace server in SMC (Servers --> SASApp - Logical Workspace Server --> SASApp - Workspace Server --> Properties --> Options --> Advanced Options... --> File Navigation Tab). You would select the "Path" radio buttn and put the absolute filepath that you want everyone to see in the "Files" tree within EG.
However, I've always had to have multiple folders available and sometimes different folders for different people. In this case, you can just add a symbolic link to the user's home directory.
For example: ln -s /FolderYouNeedAccessTo /home/user1/FolderYouNeedAccessTo