how to change your password when logged in rdp from within another rdp session

today I had to change the password of one of my acconts that I can reach only through a double rdp (i.e.: I could not use the smbpasswd command from linux :( ) Usually, when a single rdp is involved the simple trick is using its basic translation: CTRL-ALT-END is translate by the rdp client into a remote CTRL-ALT-DEL, thus allowing you to reach the screen for changing the password my doubt came from the fact that I need to do this from within another rdp session... in 2 minutes google provided me this link that clearly explains how to change your password when logged in rdp from another rdp:

1. go to the Start menu
2. Type osk and Hit enter to run the on-screen keyboard program
3. Once the On screen Keyboard is open, hold ctrl+Alt on your physical keyboard, then click on the del key in the on screen keyboard

and -BANG!- in the double-remote session you are prompted with the option to change your password job done