You can use option "Always display on screen keyboard" in policy for tablets, but in EEPC 6.0.1 it is not implemented yet (information form Release notes). There is no such information with newer version EEPC 6.1, but it still seems to be not implemented (not working), but maybe it have to be used on tablets to work.
We are on version 6.2 and have not been able to get this to work. The keyboard shows on the screen, but it is not useable. Has anyone been able to get the on screen keyboard to work with EEPC ?