Background

In xfce4, pressing Ctrl+Alt+End hotkey cycles to the next workspace. The settings for this can be displayed from the command line using:

xfconf-query -c xfce4-keyboard-shortcuts -lv | grep -i end

This reveals:

/xfwm4/custom/<Alt><Control>End            move_window_next_workspace_key
/xfwm4/default/<Alt><Control>End           move_window_next_workspace_key
/xfwm4/default/<Primary><Alt>End           move_window_next_workspace_key

Problem

When using VNC to connect to a Windows terminal, Windows authentication software prompts the user to send Ctrl+Alt+End to authenticate.

Question

How do you remove the hotkey for Ctrl+Alt+End so that the hotkey passes through to VNC?

Idea

The following did not work:

xfconf-query -c xfce4-keyboard-shortcuts -p "/xfwm4/default/<Alt><Control>End" --type string --set ''
xfconf-query -c xfce4-keyboard-shortcuts -p "/xfwm4/custom/<Alt><Control>End" --type string --set ''
xfconf-query -c xfce4-keyboard-shortcuts -p "/xfwm4/default/<Primary><Alt>End" --type string --set ''

The hotkey continues to cycle the desktops.