We are using Teamviewer for remote access to the RPi 3 and it was working fine. The latest set of 10 Pi units we bought had a problem. TV will change the ID for the Pi on reboot and will not retain any password set. Teamviewer released a version 12 which is also not working on latest Raspbian. We downloaded Raspian Jessie 2017-03-02 and are using that on these Pi units without problem. Do you know of a Raspbian change that could render Teamviewer useless?