Pre-requisite: IDP initiated SSO must be checked on Datadog SAML Configuration page
Application Name: Can be anything
Description: Can be anything
ACS URL: Use the url shown under “Assertion Consumer Service URL” on https://app.datadoghq.com/saml/saml_setup (the one containing /id/). If there is more than one value shown for Assertion Consumer Service URL, only enter one of them here.