---
schema_version: "1"
id: 193364b7a25b0c644669b8870346bbca469e6dac133676ceae7e043b684e42dd
title: Interact with Synchronized Fields
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_cab_interact_with_synchronized_fields.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_cab_interact_with_synchronized_fields.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: f66a1e62ac1d5a200d3b357276c3b2f3da44e6396e890c139bc59ffb4bb4cb03
description: Synchronized fields represent entities that are synchronizing data with Marketing Cloud Engagement.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Interact with Synchronized Fields

Synchronized fields represent entities that are synchronizing data with Marketing Cloud Engagement.

Changing a data extension’s synced fields affects the data that’s available to other Engagement apps. Before you change the sync settings, make sure that the changes don’t impact other activities.

1. In Contact Builder, click **Synchronized**.
2. To add or remove the fields that sync between your Contact Builder configuration and the data source, click **Edit Fields**.
3. Click the checkbox next to the fields that you want to synchronize.
4. Save your work, and allow some time for the sync process to complete.

Synchronized Data Sources detects the fields deleted from the original source and logs a warning, but continues syncing the data. The warning provides time for you to review the data. Synchronized Data Sources also attempts to resolve numbers that are out of bounds and dates that are before 1/1/1754.