be able to set up login for admins & employees

Our clients are having major issues with logging in as admins. Email address and passwords not being accepted. 90% of the calls we're receiving from our clients are either the admins not being able to login in or employees not being able to access their payslips. Needs to be less clunky for the less tech savvy individuals. Maybe we can set up for them and then they can change the password.