MAIL AND DIRECTORY MIGRATION
You can also add unregistered users (that is, users without Notes IDs and mail files) to the Domino Directory, but those users cannot log into Notes or gain authenticated access to Domino servers and other Domino resources through Notes.
When you migrate groups, they are added to the Domino Directory, but are not registered like users.
The LDAP Domino Upgrade Service offers advanced options for extending the LDAP schema. These advanced options let you add person and group object classes and member attributes.
To migrate users and groups from an LDAP directory server, follow this procedure:
For more information about migrating users with an LDIF file, see the topic Migrating users from an LDIF file.