To disable the Briefcase Icon via the
registry:
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows NT\CurrentVersion\Winlogon
Name: RunSyncApp
Type: REG_DWORD
Value: 0 disable
The executable for the application is %systemroot%\system32\syncapp.exe. If
your users do not have update access to the %systemroot%\system32 folder,
renaming the application is a good lockdown method.
If your workstations are installed from a network drive or unattended
installation, you can prevent the Briefcase icon from being placed on the
desktop by commenting out the syncapp.exe line in layout.inf and txtsetup.sif setup
files.