How can I implement offline user switching on shared devices in a SSO environment.
At this stage, this is not possible. Users will need to be online to do so.
Unless you implement an offline PIN login methodology that can be accessed once users have initially authenticated using SSO. So everyone that wants access to the shared device logs in at least once using SSO, creates their offline pin, and then from that point onwards those users can switch, whilst offline, using their pin.