We have 60 company android devices that are all loaded with the same google account. Once in a while something happens that kicks every single phone off of the google account and the password must be reentered before accessing Gmail, Playstore, etc. So far I have not found any pattern to these occurrences - sometimes it will go several weeks without happening, and sometimes only several days. I have also noticed that the personal Google accounts have no problems, only the company account. What could cause this?