Follow these steps:
1. In Workgroup Manager, select a group.
2. Select Preferences, Login.
3. Click the Login Items tab.
4. Select the "Add group share point" checkbox.
5. Click Apply Now.
Optionally, if you want the group volume to appear in the Dock:
1. For the groups preferences, select Dock.
2. Click the Dock Items tab.
3. Select the "Add group folder" option.
4. Click Apply Now.
Note: The group folder is not created immediately. It is created by a cron job overnight. If you want to force immediate creation of the group folder, you may use the CreateGroupFolder command in Terminal. For more information on this command, see page 202 of the Server Admin Guide for Mac OS X 10.2.3 or later.
For more information, see technical document 107308, "
Mac OS X Server 10.2: Clients Cannot Select a Workgroup While Logging In".