Microsoft Research study says constant passwords changing is counterproductive for security. Microsoft researcher says a minute of user time each day is worth $16 billion a year. Changing passwords isn’t all that effective to begin with, because it assumes that the snooper who’s just lifted your password is going to wait until you’ve changed to a new one to use it. Security pros need to understand that all this education costs users time, while benefiting only that small sliver who actually need to be told 123456 is a bad password.”]
Source: https://gizmodo.com/are-passwords-a-waste-of-time-5514469