Our ServiceNow instance is running in the cloud, and we use ADFS SSO authentication to connect to it. We got the add-on working with a local account but we are unable to authorize with the Service Now web service using an AD account.
Does this add-on support SSO authentication?
When you install the Integration application for Service Now into your snow tenant, it will create the Splunk role and walks you through adding the Splunk user. This is the user you have to use to enable the integration to work correctly. - It is a local user
https://docs.splunk.com/Documentation/AddOns/released/ServiceNow/ConfigureServiceNowtointegratewithS...
It does not. You need to have your SNOW admin create a local account.
Also see this Answer post: https://answers.splunk.com/answers/403964/native-saml-authentication-with-shibboleth-idp.html