Hi i need some help. we have used for a school 50 same tablets with same configuration. We have setup the same google account to all tablets. the last days we realised that in 4-5 tablets asks to enter again the password and also it finds it difficult to accept it. The courses start this week and i'm afraid the possibility the account lock or continuously password requests. i have used the same google account to be able to install a paid once app to all tablets, students use drive to download text files i upload and for convenience in account management.