Enabling password for a Virtual Meeting ID is possible only via:
(1) Admin Console (Sign-in as account administrator > https://manage.lifesizecloud.com > Go to Meetings > search for your meeting and click the meeting display name to Edit Meeting
(2) Desktop Client (Windows / MAC)
(3) Webapp Client (supported only in Chrome browser) ( Sign-on to you Lifesize Cloud account via https://webapp.lifesizecloud.com)
(4) Mobile Clients (Android & iOS).
Note: You cannot edit your Virtual Meeting ID & password from the Lifesize Endpoint (Icon and 220 Series)