PAM + LDAP authentication without local accounts

I have a SLES 9 server running NIS and authenticating against a Solaris LDAP (Sun One Directory Server 5.2. p4) machine. It works fine with local users, but our non-local NIS users cannot login.  What is the necessary config for logging *without* a local account in /etc/passwd?

Here is what I have configured so far...

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/etc/nsswitch.conf:

passwd: compat
group:   compat

passwd_compat: ldap nis files
group_compat:   ldap nis files

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/etc/security/pam_unix2.conf:  

auth:             use_ldap nullok
account:        use_ldap
password:       use_ldap
session:          none

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/etc/ldap.conf:

host    10.0.42.17:390
base    ou=people,ou=intranet,dc=motorola,dc=com
ldap_version    2

nss_map_attribute       uniqueMember member
nss_base_passwd ou=people,ou=intranet,dc=motorola,dc=com
nss_base_shadow ou=people,ou=intranet,dc=motorola,dc=com
nss_base_group  ou=people,ou=intranet,dc=motorola,dc=com
pam_filter                  objectclass=person

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/etc/pam.d/sshd:

auth     required      pam_nologin.so
auth     sufficient    pam_ldap.so      
auth     required      pam_unix2.so    use_first_pass # set_secrpc

account  required      pam_unix2.so

password required      pam_pwcheck.so
password required      pam_ldap.so      use_authtok
password required      pam_unix2.so     use_first_pass use_authtok

session  required      pam_unix2.so
session  required      pam_limits.so
session  required      pam_env.so
session  optional      pam_mail.so

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/etc/ssh/sshd_config:

# Set this to 'yes' to enable PAM keyboard-interactive authentication
# Warning: enabling this may bypass the setting of 'PasswordAuthentication'
UsePAM  yes

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...what is missing?

Thank you,
BJP