---
schema_version: "1"
id: 25e9ed06c9586a87c5ca9b97085c5088490677b221f2158cdcfc77c5e9c05f26
title: Federated Search Considerations
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/ai/264-0-0/search_federated_considerations.md
canonical_url: https://help.salesforce.com/s/articleView?id=ai.search_federated_considerations.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 2013fda7604787fb2db21b2f3adf37cc7bd1bf20b9e140881b3587793b554400
description: When setting up federated search, familiarize yourself with the nice-to-knows and limitations.
products:
  - Cross Cloud
release: "264"
---
# Federated Search Considerations

When setting up federated search, familiarize yourself with the nice-to-knows and limitations.

- A custom tab isn’t required for the external object to appear in search results. If you created a custom tab, the source could show up both under External Results and in the list of objects.
- On the search results page, column resizing and text wrapping aren’t available for external results.
- Federated Search supports only external lookup relationships, and the Federated Search external object is always the parent.
- Unlike Salesforce Connect, Federated Search external objects only contain fields defined by the external data source. In addition, unlike other external data sources, Federated Search is meant to display search result information, not records.
- The following limits also apply:<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small ">
          <colgroup>
            <col style="width:50%">
            <col style="width:50%">
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          <tbody>
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              <td class="slds-cell-wrap" style="vertical-align:top;">Maximum number of new search results per hour</td>
              <td class="slds-cell-wrap" style="vertical-align:top;">
                <p>100,000 per org</p>
                <p style="margin-bottom:0;">This is a joint limit among all external data sources. For example,
                  if you have OData and OpenSearch sources, the limit includes both usages.</p>
              </td>
            </tr>
            <tr class="">
              <td class="slds-cell-wrap" style="vertical-align:top;">Maximum external objects per org</td>
              <td class="slds-cell-wrap" style="vertical-align:top;">
                <p>200</p>
                <p style="margin-bottom:0;">This is a joint limit among all external data sources. If the default value for
                  external objects in your org is 100, create a support case to increase your org limit to
                  200.</p>
              </td>
            </tr>
            <tr class="">
              <td class="slds-cell-wrap" style="vertical-align:top;">Maximum length of the OAuth token that’s issued by the external system</td>
              <td class="slds-cell-wrap" style="vertical-align:top;">4,000 characters</td>
            </tr>
          </tbody>
        </table>