Citrix MetaFrame Application for Windows 1.8 Administrator's Manual page 134

Change client changes the current ICA Client device mapping settings.
change client [/view | /flush | /current]
change client [{/default | [/default_drives] | [/default_printers]}
[/ascending]] [/noremap] [/persistent] [/force_prt_todef]
[/delete host_device] [host_device client_device] [/?]
host_device
Specifies the name to be given to a mapped client device.
client_device
Specifies the name of a device on the client to be mapped to host_device.
/view
Displays a list of all available client devices. Type net use to display current
client device mappings.
/flush
Flushes the client drive mapping cache. This forces the MetaFrame server and
the client to resynchronize all disk data.
/current
Displays the current ICA Client device mappings.
/default
Resets host drive and printer mappings to defaults.
/default_printers
Resets host printer mappings to defaults.
/default_drivers
Resets host drive mappings to defaults.
/ascending
Uses ascending, instead of descending, search order for available drives and
printers to map. This option can only be used with /default, /default_drives,
or /default_printer.