LDAP with ESXi 4.1 update 1

Hi,

I would like to authenticate users based on a LDAP database.

I've seen a lot of articles about this. But I could not find the command esxcfg-auth on my ESXi 4.1u1 or ESXi 4.0.

There nothing about this command on cli reference guide.

Does this command renamed ?

I also looked for files like /etc/likewise/openldap.conf or /etc/ldap.conf without success.

Is there a package to install to have ldap working on ESXi ?

I've already read documentation about AD but I d'ont want AD, just LDAP.

Thanks

Olivier