By default, Solaris 9 uses a new schema for automount entries instead of using generic NIS map schema which Solaris 8 clients used. This means that if you setup a server with Solaris 9 tools, Solaris 8 clients can not see the automount entries. For sites where the server being setup is to serve both Solaris 9 and Solaris 8 clients, a profile can be created to map the schema to the old one before adding automounter entries. This would ensure that ldapaddent(1M) adds the entries using the old schema. However, note that this would also mean that all Solaris 9 clients must use a profile where the schema for automount is mapped.
You need to add the following mapping attributes to your profile for this mapping to take effect.
attributeMap: automount:automountMapName=nisMapName attributeMap: automount:automountKey=cn attributeMap: automount:automountInformation=nisMapEntry objectclassMap: automount:automountMap=nisMap objectclassMap: automount:automount=nisObject