You can determine the user's login folder at the user and User Setting Level. Generally, you will want to set this at the user level.
Start the Administrator Interface and connect to the server.
Click the Server tab on the bottom left side of the Administrator Interface.
In the left window, click a user.
Click the Main tab.
Select the Home Dir check box.
Click the browse button next to the Home Dir box.
Select the folder you want the user to be placed in when they log on.
Click Apply.
Selecting the Treat home folder as default root folder check box makes the home folder the users root folder.
Start the Administrator Interface and connect to the server.
Click the Server tab on the bottom left side of the Administrator Interface.
In the left window, choose the user and click their User Setting Level.
Click the Main tab.
Clear the Home Dir check box. Selecting this box forces the default root folder of all users in the setting level to a specified folder. With the box selected choose a folder using the browse button.
Click Apply.