Engine Mobile Directory Structure with Geodatabase Replication
This directory structure is necessary if you're planning to use Geodatabase Replication to maintain an updated backdrop database in the field as well as send/receive sessions and designs. If you elect to create a login database, Geodatabase Replication will also ensure login databases in the field are synchronized with the login database on the Enterprise.
The image below illustrates set up on the Administrator machine. Once configuration is complete, copy the directory structure on the Administrator machine (along with the databases highlighted in green in the Field Directory Structure) to all field machines.