Domain password not working

I've had my domain password working forever. all of sudden it's not working. I've checked the policy and it's still active. Here's the results from net accounts on our primary DC
Force user logoff how long after time expires?:       Never
Minimum password age (days):                          0
Maximum password age (days):                          120
Minimum password length:                              8
Length of password history maintained:                10
Lockout threshold:                                    10
Lockout duration (minutes):                           10
Lockout observation window (minutes):                 10
Computer role:                                        PRIMARY

here's the results from net user <username> /domain
User name                    
Full Name                    
Comment
User's comment
Country/region code          000 (System Default)
Account active               Yes
Account expires              Never

Password last set            12/16/2016 3:00:52 PM
Password expires             4/15/2017 3:00:52 PM
Password changeable          12/16/2016 3:00:52 PM
Password required            Yes
User may change password     Yes