Can't delete domain user

I wanted to add a local user but somehow I created a domain user, now I want to remove this domain user to create it again as local user. The question is that I can not delete this domain user , the user is not listed in /etc/passwd, if i test userdel says user does not exists , If I do id user or getent passwd user it shows me the user , and useradd user tells user already exists ,so the domain user exists .
How can I delete this domain user ?

Thanks