---
title: Customizing assertions and authentication requests
description: Customize applicable messages by enabling OGNL expression and going to the URL window to access the Show Advanced Customizations option.
component: pingfederate
version: 13.1
page_id: pingfederate:administrators_reference_guide:pf_customiz_assert_and_auth_requests
canonical_url: https://docs.pingidentity.com/pingfederate/13.1/administrators_reference_guide/pf_customiz_assert_and_auth_requests.html
llms_txt: https://docs.pingidentity.com/pingfederate/llms.txt
docs_for_agents: https://developer.pingidentity.com/build-with-ai/docs-for-agents.md
revdate: July 5, 2022
section_ids:
  about-this-task: About this task
  steps: Steps
  related-links: Related links
---

# Customizing assertions and authentication requests

Customize applicable messages by enabling OGNL expression and going to the **URL** window to access the **Show Advanced Customizations** option.

## About this task

Some browser single sign-on (SSO) use cases might require additional customizations in the assertions sent from the PingFederate identity provider (IdP) server to the service provider (SP), or in the authentication requests sent from the PingFederate SP server to the IdP. PingFederate can fulfill these use cases on a per-connection basis using OGNL expressions.

## Steps

1. Enable OGNL expression by editing the `org.sourceid.common.ExpressionManager.xml` file, located in the `<pf_install>/pingfederate/server/default/data/config-store` directory.

2. Select the applicable SP or IdP connection.

3. On the **Activation & Summary** window, scroll to the Protocol Settings section, and click **Assertion Consumer Service URL** for an SP connection, or click **SSO Service URLs** for an IdP connection.

4. Click **Show Advanced Customizations** to customize the applicable message.

   The available customizable **Message Types** vary depending on your federation role (IdP or SP) as well as the protocol of the connection (SAML 1.x, SAML 2.0, and WS-Federation). After you select a message type, you have access to its list of **Available Variables**. You can customize the assertions or the authentication requests as needed.

## Related links

* [Attribute mapping expressions](pf_attribute_mapping_expressions.html)

* [Enabling and disabling expressions](pf_enable_disable_express.html)