---
title: Restrictions
description: The following restrictions apply to using a Kafka sync destination:
component: pingdirectory
version: 11.1
page_id: pingdirectory:pingdatasync_server_administration_guide:pd_sync_restrictions
canonical_url: https://docs.pingidentity.com/pingdirectory/11.1/pingdatasync_server_administration_guide/pd_sync_restrictions.html
llms_txt: https://docs.pingidentity.com/pingdirectory/llms.txt
docs_for_agents: https://developer.pingidentity.com/build-with-ai/docs-for-agents.md
revdate: September 13, 2023
---

# Restrictions

The following restrictions apply to using a Kafka sync destination:

* The sync source must be a PingDirectory server.

* The `changelog` backend must be enabled on all instances of the PingDirectory server.

* To ensure the availability of an entry's attributes from before and after a change, the configuration property `changelog-include-key-attribute` must include `'*'`.

* You must configure the sync pipe in notification mode (`synchronization-mode:notification`), because a Kafka sync destination can't retrieve the current version of a destination entry.

The following restrictions apply to Kafka sync sources:

* The `resync` command isn't supported.