Configuration data for suffixes with multiple backends is not migrated. If dsmig detects that a suffix has more than one backend, it does not migrate any of the configuration entries that belong to that suffix. This includes configuration entries for the mapping tree, replicas, replication agreements, LDBM instances, indexes, and encrypted attributes. Instead, all of these entries are dumped in the file new-instance-path/migration/old_distribution_conf.ldif. You can import the distribution configuration data from this file after migration, if required.