I have no idea why RedHat wants "organization" or why Solaris wants "nisDomainObject" (I don't use either of them) but my guess is that both suppliers have seen fit to amend the schema in some way. Note in particular that Solaris has its own version of LDAP, and that RedHat distributions are invariably broken in some way.
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/Shared Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html