There are many different PAM modules which communicate with different AAA server, Solaris has the native PAM LDAP library, use /etc/pam.conf to relay the authentication to LDAP or other AAA, for instance LDAP:
<serive name> auth required pam_ldap.so
<service name> account required pam_ldap.so
Run the following command to configure Solaris native LDAP: