---
schema_version: "1"
id: b2069da973ed4a70f6d01049ecf874310194b601497f60974206a249e19170df
title: Sync Considerations for Salesforce Connect OData Adapters
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/platform/264-0-0/odata_considerations_sync.md
canonical_url: https://help.salesforce.com/s/articleView?id=platform.odata_considerations_sync.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 72ce3de7254a872111cafa47503d552318e42670cbbb7ea460ed727d5196107a
description: When you validate and sync an external data source of type OData 2.0, 4.0, or 4.01, some special behaviors and limitations apply.
products:
  - Salesforce Platform
  - Security
release: "264"
---
# Sync Considerations for Salesforce Connect OData Adapters

When you validate and sync an external data source of type OData 2.0, 4.0, or 4.01, some special behaviors and limitations apply.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition">
      <colgroup>
        <col>
      </colgroup>
      <tbody>
        <tr class="">
          <td class="slds-cell-wrap" style="vertical-align:top;">Available in: both Salesforce Classic and Lightning Experience (not for high-data-volume
            external objects)</td>

        </tr>
        <tr class="">
          <td class="slds-cell-wrap" style="vertical-align:top;">
            <p>Available in: <strong>Developer</strong> Edition</p>
            <p style="margin-bottom:0;">Available for an extra cost
              in: <strong>Enterprise</strong>, <strong>Performance</strong>, and <strong>Unlimited</strong>
              Editions</p>
          </td>

        </tr>
      </tbody>
    </table>

Syncing always enables search on the external object when search is enabled on the external data source, and vice versa.

![Important](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-platform-extend_click-264-0-0-production-enus/5f7d9219-b7b1-4552-8891-f1aba9b289fc/images/icon_important.png)

Important When you select the tables to sync, determine whether check marks appear in the Synced column.

If a Synced check mark appears, your org has an external object whose object name matches the table name. If you select the table and click **Sync**:

- The external object is overwritten.
- Any custom field on the external object is overwritten if its API name (for example, `Email__c`) associates it with a table column name (for example, `Email`).
- Any other custom fields on the external object remain as they are, including:
    - Previously synced custom fields whose API names were changed by editing their Field Name values.
    - Manually added custom fields whose API names aren’t associated with table column names.

If no Synced check mark appears, and you sync the table, a new external object is created in your org. The new external object’s object name matches the table name.

For example, if the table name is changed on the external system to no longer match the object name of the external object, syncing that table creates a new external object in Salesforce. We recommend that you change the object name of the existing external object to match the new table name on the external system before you sync that table.

Also review the considerations that apply to all Salesforce Connect adapters.

#### See Also

- [Sync an External Data Source for Salesforce Connect](https://help.salesforce.com/s/articleView?id=platform.platform_connect_considerations_sync.htm&release=264.0.0&type=5 "When you validate and sync an external data source, it creates or overwrites Salesforce external objects that map to the external system’s schema. Syncing doesn’t copy any data into your Salesforce org or write data from your org to the external system.")
- [Define an External Data Source for Salesforce Connect—OData 2.0 or 4.0 Adapter](https://help.salesforce.com/s/articleView?id=platform.platform_connect_add_external_data_source.htm&release=264.0.0&type=5 "Connect your Salesforce org to data that’s stored in an external system, such as SAP® NetWeaver Gateway, Microsoft Dynamics® NAV, or IBM WebSphere®.")
- [Define an External Data Source for Salesforce Connect OData 4.01 Adapter](https://help.salesforce.com/s/articleView?id=platform.odata_add_external_data_source.htm&release=264.0.0&type=5 "Connect your Salesforce org to data that’s stored in an external system, such as SAP® NetWeaver Gateway, Microsoft Dynamics® NAV, or IBM WebSphere®.")
- [OData Adapters for Salesforce Connect](https://help.salesforce.com/s/articleView?id=platform.odata_adapter_about.htm&release=264.0.0&type=5 "Connect to your back office for a complete view of your business. With the OData 2.0, 4.0, or 4.01 adapter, Salesforce Connect uses Open Data Protocol Version 2.0, Version 4.0, or Version 4.01 to access data that’s stored outside Salesforce.")
- [OData Type Mapping](https://help.salesforce.com/s/articleView?id=platform.odata_type_mapping.htm&release=264.0.0&type=5 "Salesforce Connect maps OData types to Salesforce metadata field types when syncing metadata and converting values between Salesforce and external systems.")