Prerequisites

Pricefx URL	https://demo.pricefx.eu/pricefx/[Partition]/saml/[SAML_SERVICE_NAME]/[SAML_CONFIGURATION]/?RelayState=sugarCRM
SAML_SERVICE_NAME	signon, consume
SAML_CONFIGURATION	Possible to create more configurations when you need to connect a partition to more CRM systems.
Partition	mb1_sfdc
RelayState	Name: sugarCRM URL: https://demo.pricefx.eu/unity/develop/?partition=mb1_sfdc&confName=crm_config&applicationEnvironment=sugarCRM

Configure SAML in Pricefx

You need to prepare a SAML Configuration endpoint.

In Pricefx, go to Administration > Configuration > External Systems > SAML Configuration and create a new configuration.
For details see Configure SAML in Pricefx.
You will obtain the Certificate and SAML IdP URL in the next steps of the Okta configuration.

This will provide an endpoint for the sugarCRM and will enable the Pricefx authentication.

In Okta, go to the Admin Page.
In the Admin Page, you need to switch to Classic UI (in the left upper corner).
Go to Applications, click Add Application and find Pricefx. (It will also work with another Okta application; it just must support SAML. Then there will be slightly different URL naming.)
Configure your ACS URL:
https://demo.pricefx.eu/pricefx/mb1_sfdc/saml/consume/OKTA_SUGARCRM_PRICEFX
Go to the application you just created and go the tab 'Sign on' where you can see SAML 2.0 settings with the link "View setup instructions". Click it and you should see this:
Use the certificate and the IdP URL for the SAML configuration in the Pricefx SAML configuration you created previously.

Read this information on how to add iFrame to the Opportunity page: https://www.w-systems.com/blog/adding-a-google-map-to-a-module/
Configure a new Field (type iFrame) and enter this URL:
https://demo.pricefx.eu/pricefx/mb1_sfdc/saml/signon/OKTA_SUGARCRM_PRICEFX/?RelayState=sugarCRM
Test it on the Opportunity page. When you are not logged in Okta in the other browser tab, then you get the Okta login window.