Beginning with the Solaris 9 release, by default the Solaris software uses a new schema for automount entries. This new schema replaces the generic NIS map schema that Solaris 8 clients used. This means that if you set up a server with Solaris 9 or later software tools, Solaris 8 clients cannot see the automount entries. For sites where the server being set up is to serve both Solaris 8 and later Solaris software 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 clients based on Solaris 9 or later software 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