* `skip_thread_containment`: Skip filter out broken threads. The default is `false`.
* `limit_to_local_content`: Limit unauthenticated users to search for local statutes and users only. Possible values: `:unauthenticated`, `:all` and `false`. The default is `:unauthenticated`.
* `dynamic_configuration`: Allow transferring configuration to DB with the subsequent customization from Admin api.
* `max_account_fields`: The maximum number of custom fields in the user profile (default: `4`)
* `max_remote_account_fields`: The maximum number of custom fields in the remote user profile (default: `10`)
* `max_account_fields`: The maximum number of custom fields in the user profile (default: `10`)
* `max_remote_account_fields`: The maximum number of custom fields in the remote user profile (default: `20`)
* `account_field_name_length`: An account field name maximum length (default: `255`)
* `account_field_value_length`: An account field value maximum length (default: `255`)
* `external_user_synchronization`: Enabling following/followers counters synchronization for external users.