getent passwd / openldap

I am running into a strange problem and can not seem to diagnose it -

I have openldap running and I am able to see ldap user accounts if I do
a 'getent passwd'

However, there are a few accounts that just do not appear. I can
ldapsearch them fine - I can getent passwd id numbers around them -
these few just will not show . They do however show if I do a 'getent
shadow'

is there a flag or something that I may be missing - it is driving me
crazy

thanks