Domain Account Keeps locking out

One domain user's account keeps locking out. I have checked the credential manager to remove all without luck till I found this article at this link, https://joshancel.wordpress.com/2017/01/10/hidden-stored-credentials/.

Summary:

To resolve I found these below steps.

Download PsExec.exe from http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx and copy it to C:\Windows\System32 .
From a command prompt run:    psexec -i -s -d cmd.exe
From the new DOS window run:  rundll32 keymgr.dll,KRShowKeyMgr
Remove any items that appear in the list of Stored User Names and Passwords.  Restart the computer.