RemoveOnLock

Specifies devices or classes to remove when the client machine is locked.

Syntax:
Each device is case-insensitive and of the form
VID=XXX PID=XX;VID=YYY PID=YY
Each class is case-insensitive and of the form
class=XXX subclass=XX prot=X

Example:
class=03 subclass=01 prot=01;VID=173E PID=0046

Default Behavior:
HID Keyboards and Mouse (class=03 subclass=01 prot=01;class=03 subclass=01 prot=02;class=03 subclass=00 prot=01;class=03 subclass=00 prot=02) are removed and auto redirected during client lock and unlock.

Semicolon-separated list of USB devices to be removed on lock.

RemoveOnLock

Registry Hive	HKEY_LOCAL_MACHINE
Registry Path	Software\Policies\Citrix\ICA Client\GenericUSB
Value Name	RemoveOnLock
Value Type	REG_SZ
Default Value	class=03 subclass=01 prot=01;class=03 subclass=01 prot=02;class=03 subclass=00 prot=01;class=03 subclass=00 prot=02