How to reset student's password as a course administator

[ncubator]

Hi,

when my students try to reset password, they get the following message: "The password for this login should have been given to you by the system administrators at University Inc, and Instructure doesn't have access to your password. If your password is not working, please contact the system administrators about changing or verifying your password." 

How can I do it for my students in Free for teacher account ?