m aybe they dont offer it to your employer anymore
If your employer discount suddenly stopped, the reason should be documented in your account. It possible the terms of the agreement with your employer has changed which would mean that you would need to re-apply for the discount. I have provided a link below that will take you to the employee discount sign up screen on the My Verizon web site.
http://www.verizonwireless.com/b2c/employee/emaildomainauthentication.jsp